Browsing by Subject "Agriculture"

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Agriculture in responsibility for our common world
(2022) Raupp, Manfred G.; Thomas, Angelika; Schüle, Heinrich; Carabet, Alin Flavius; Salasan, Cosmin; Fora, Ciprian George; Weinmann, Markus; Madora GmbH; University of Hohenheim, Institute of Crop Science; Klara Bradacova
The vocational training course program “Agriculture in Responsibility for our common World” organised within the frame of the Banat Green Deal Project “GreenERDE” (Education and Research in the context of the digital and ecological transformation of agriculture in the Banat Region and Baden-Württemberg - towards resource efficiency and resilience) and delivered between June 2021 and May 2022 targets the knowledge and experience transfer to the farmer community in the Banat Region, Romania and other parts of the world. Current and future challenges, such as the ecological conversion and digital transformation of agricultural production, but also social, economic and cultural aspects haven been addressed transcending prevailing patterns. The innovative and relevant knowledge originating from practice, experiments, research or development projects throughout Europe and other continents is presented in a training format for interested participants.
AKIS in England - overview and spotlights
(2024-11-11) Knierim, Andrea; Ingram, Julie
A situation analysis of the AKIS in England was undertaken in the time from January to May 2024 with a special focus on the private sector advisory subsystem’s actor constellation and performance based on grey and peer reviewed literature, expert and stakeholder interviews. Results show a particular diversity of actor types, characterised by different organisational features. Thus, it seems that in many places in England, farmers have many choices among service providers when it comes to making use of advisory services. Secondly, the public actor, the governmental department for environment, food and rural affairs (DEFRA) plays a fostering role for offering advisory services in combination with setting up ecosystem service and climate mitigation related measures. Thirdly, a shared conviction of the advantages of peer-to-peer learning formats among all service providing actors in the AKIS was observed as well as a readiness to collaborate with other AKIS actors across all organisational types and subsystems. On the other hand, there is a widely expressed need of coordination among AKIS actors, but no strategic planning or initiative in this regard. Former significant actors have shifted or reduced their roles and influence and, there is a considerable number of hybrid initiatives and innovation networks emerging, which represent and promote an array of new farming practices, technologies and food (production) styles and bridge various communities of farmers, researchers, consumers, citizens and other actors. Although the present study fulfils its objective of providing a (snapshot) overview of the AKIS in England, it equally reveals the blind spots and information deficits with respect to farmers’ needs and interests and the degree to which they are satisfied through the diversity of service actors.
Alte und neue Wege des Gemeinschaftsmarketings für Agrarprodukte und Lebensmittel
(2007) Rügge, Matthias; Kliebisch, Christoph
Gemeinschaftsmarketing für Agrarprodukte und Lebensmittel ist spätestens seit der Ein-führung des Absatzfondsgesetzes im Jahr 1969 das zentrale Instrument zur Absatzförde-rung in der Agrar- und Ernährungswirtschaft. Institutionalisiert in der Centralen Marketing-Gesellschaft der Deutschen Agrarwirtschaft (CMA) ist das Gemeinschaftsmarketing jedoch vor allem in der jüngeren Vergangenheit zunehmender Kritik ausgesetzt. Mit dem vorlie-genden Beitrag soll daher neben einem historischen Abriss zum Gemeinschaftsmarketing für Agrarprodukte und Lebensmittel und dem derzeitigen Organisationsaufbau ein Blick auf andere Organisationsformen des Gemeinschaftsmarketing gelenkt werden. Exemplarisch geschieht dies anhand des Modells der ?Levy Boards? in Großbritannien. Letztlich wird hierbei der Frage nachgegangen, ob bzw. welche Elemente dieses Modells für das bundesdeutsche Gemeinschaftsmarketing Vorbildcharakter haben.
An analysis of gender in intra-household decision-making as an important socio-economic factor in agriculture-nutrition linkages
(2021) Sariyev, Orkhan; Zeller, Manfred
In 2018, almost 2 billion people around the globe experienced severe or moderate levels of food insecurity. Poverty is strongly linked with food insecurity, and most of the extreme poor live in rural areas where agriculture is the main livelihood. Thus, agricultural and rural development have profound implications for rural households. Agricultural produce is consumed or marketed or both; when marketed, the generated income can be used for (safe and nutritious) food purchases and non-food expenditures, including medical expenses and investments in sanitation. Some income may not be consumed directly but saved or invested in the form of physical, social or human capital. Moreover, considering that the end goal of development should be an environment in which people can be creative and freely enjoy a long and healthy life, rural and agricultural development will have implications for all elements of human development: health, education, poverty, environment, security, women’s status, and finally, food and nutrition. The effect is seemingly more direct and profound in terms of its contribution to a healthy household environment and food security, which together determine nutritional outcomes. However, this seemingly straightforward linkage between agriculture and nutrition is challenged by numerous socio-economic factors. This dissertation concentrates on the gender dynamics of intra-household decision-making as an important socio-economic factor in the agriculture and nutrition framework. Here, I refer to gender dynamics as the interactions and relations between men and women that can strengthen or confront the social norms of a society. Thus, the main objective is to examine the gender dynamics of decision-making as an important component of agriculture-nutrition linkages. There are three sub-objectives that concentrate on selected linkages within the framework. Given the high concentration of women’s empowerment literature in social contexts in which females are underprivileged, the first sub-objective is to investigate the implications of women’s empowerment in contexts in which women historically experienced equality or favoritism. Second, concentrating on the role of women’s empowerment in the agriculture and nutrition framework, the next objective is to study the implications of women’s empowerment on varietal adoption, diversified production, and consumption. The third objective is to examine the viability of production diversification as a strategy to improve household diets. The findings of this dissertation are based on data collected from Bhutanese and Ethiopian households. The survey in Bhutan employed multistage random sampling; it was implemented in November 2017 and covered 251 households in two central districts of Bhutan: Tsirang and Dagana. The survey in Ethiopia was conducted in 2014 and 2016 and covered 390 Ethiopian households located in a radius of circa 150-200 km around the town of Hawassa. These households were randomly selected from a sample of farmers from a survey that was conducted by the International Food Policy Research Institute (IFPRI) for the Ethiopian Agricultural Transformation Agency (ATA) in 2012. This dissertation has five chapters. The first chapter gives a general overview and provides a conceptual framework that helps to describe the research topics and questions investigated in the following chapters. The three following chapters are scientific papers that have been prepared for publication in scientific journals. The second chapter deals with the first sub-objective. It investigates women’s participation in crucial domains of intra-household decision-making and its implications for dietary quality in Bhutanese households. The third chapter studies the effect of the main female’s risk preference on the adoption of high-yielding varieties (HYVs) conditional on the dominance of female preferences declared in domestic decision-making. The fourth chapter explores the association between women’s participation in decision-making and both agricultural production and dietary diversity. The final chapter concludes the dissertation, highlights main limitations, and gives recommendations for future research and policies. Chapter 1 discusses the agriculture-nutrition linkages and interacting socio-economic factors of interest in the conceptual framework of the dissertation. Chapter 2 investigates the implications of women’s participation in domestic decision-making processes for dietary quality in Bhutanese rural households. Bhutan was selected as the country of interest for this chapter because polyandry and matrilineal succession were still observed in some ethnic groups through the 20th century. We employ a mixed methods research approach to investigate women’s participation in domestic decision-making processes and its implications for dietary quality at the household level. Considering the historical presence of matrilineal succession in Bhutan, we also check for any association between women’s land ownership and participation in domestic decision-making using non-parametric tests. Quantitative analyses and in-depth interviews reveal no lack of participation in crucial domains of domestic decision-making for Bhutanese women. We observe a positive association between women’s participation in decision-making and their property rights; thus, it is plausible that the matrilineal succession might have provided for women’s empowerment over time. Moreover, we find that gender equality in decision-making results in better dietary diversity in Bhutanese households. Given the results, we recommend that social programs focus not merely on women’s empowerment, but gender-equal human development in general. The findings contribute to the gender literature and emphasize the importance of gender equality. Considering that females are generally found to be more risk averse than males and that risk aversion hinders technology adoption, in Chapter 3, we study the importance of the main female decision-maker’s risk preference for the adoption of HYVs in Ethiopia. Most often, food security is the ultimate goal for the rural poor in Ethiopia. Their risk preferences are likely to determine their willingness to trade some short-term security for a greater potential income and security in the future. Rural households are disinclined to adopt new varieties as they are unfamiliar and present a risk of failure. The number of female decision-makers in a household is assumed to reflect the dominance of female preference declared in household decision-making. The main female decision-maker is assumed to be empowered to express her preferences more strongly and freely when the decision-making processes involves more female members. In this case, the impact of her risk preferences is likely to be more profound. To the best of my knowledge, this hypothesis has not been investigated before. Considering that rural households are constrained differently, we want to study both adoption and intensity of the HYV adoption. The results show no effect of the main female’s or male’s risk preferences on the adoption of HYV seeds. It is observed that the adoption decision is mostly determined by access and availability, which are captured by wealth, access to extension, and all-weather roads. We observe a positive association between the main female’s risk preference and the intensity of the adoption at higher levels of women’s participation in decision-making. As hypothesized, the conditionality of the effect of female risk preference on the level of female dominance in decision-making is observed. Given these results, we conclude that the main female’s risk preference matters for the intensity of HYV adoption. Given the potential risk of crop failure when adopting HYV, a risk-taking female is willing to risk her household’s short-run security to a potential learning effect from the new variety and potentially gain a higher income and more security in the long-run. The findings from this chapter contribute to the gender and technology adoption literature. The study interacts female risk preference with a proxy that measures female dominance in decision-making in an HYV adoption study. The results of our analysis of the role of the main female’s risk preferences in agricultural technology adoption signify the importance of a gendered lens to intra-household decision-making and risk preferences for future empirical studies. Nutrition sensitive agricultural development programs consider diversified farm production as a promising strategy to achieve better dietary outcomes for rural poor who are mostly subsistence oriented. In Chapter 4, we mainly question the viability of this strategy for rural Ethiopian households. Furthermore, considering that both household-level production diversification and consumption choices are outcomes of intra-household decision-making, we investigate the implications of women’s participation in the domains of decision-making for both outcomes. Thus, there are two objectives in Chapter 4. The first is to estimate the association between production diversification and household dietary diversity in various settings, and the second is to examine the association of female participation in decision-making with both livelihood outcomes separately. We find that on-farm diversification can be a feasible strategy to improve the diets of those who are mostly subsistence oriented and therefore highly dependent on agricultural production and those who live a great distance from markets. These results were obtained by employing and carefully interpreting multiplicative interaction models. We find that women’s participation in decision-making regarding which crops are grown is associated with more diversity both in terms of food groups and the number of different livestock and crop species produced. Nevertheless, we do not find any association when both evenness and richness of crop species are considered together as an indicator of diversification. This is due to the fact that sampled Ethiopian women are observed to be involved in decision-making on small plots, such as kitchen gardens, which contribute to the richness of species but not to the evenness in terms of the cultivated area. Furthermore, we estimate a positive association between women’s decision-making regarding household expenditures (that include food, clothing, and household and agricultural assets) and dietary diversity indicators. In light of these results, we conclude that development programs could promote production diversification in remote rural areas where markets and non-farm income are hardly accessible, but even then, the viability of this strategy is very questionable due to the marginal effects that demand mostly unrealistic changes. We recommend that more attention and effort be directed toward gender-inclusive social and economic development policies together with infrastructural and market development projects to achieve sustainable returns to nutrition. We contribute to the agriculture and nutrition literature by highlighting an important covariate, that is gendered decision-making, and calling attention to an in-depth approach to the analyses of this kind to better assist practitioners. Overall, the main contribution of this dissertation is that the gender dynamics in intra-household decision-making is an important socio-economic factor in the agriculture and nutrition framework. The findings prove that gender sensitive policies and programs will contribute to this component and sustain the linkages between agriculture and nutrition in rural areas. It is observed that women’s empowerment in farming and household-related decision-making positively contributes to various components like varietal adoption, diversification, and household-level dietary diversity in the agriculture and nutrition framework. However, extensive contextual knowledge is necessary to ensure that gender bias is correctly approached and treated to yield positive and sustainable outcomes in different societal settings.
Bildung und Forschung im Kontext der digitalen und ökologischen Transformation des Agrarbereichs im Banat und Baden-Württemberg - auf dem Weg zu Ressourceneffizienz und Resilienz
(2023) Weinmann, Markus; Landtag und Staatsministerium Baden-Württemberg , Universität für Lebenswissenschaften " König Michael I " in Timisoara; Raupp, Manfred G.; Ludewig, Uwe; Flad, Angelika
The Banat Green Deal project "GreenERDE" (Education and Research in the context of the digital and ecological transformation of agriculture in the Banat Region and Baden-Württemberg - towards resource efficiency and resilience) aimed to strengthen the the competitiveness of the agricultural sector in the Romanian Banat, Baden-Württemberg and neighboring regions with innovative technical and at the same time socio-cultural connect interesting content. The advanced training program “Farming in Responsibility for Our Common World” carried out as part of this project aims at the transfer of knowledge and experience among farmers and other interested persons. Current and future challenges, such as ecological conversion and the digital transformation of agricultural production, but also social, economic and cultural aspects were addressed. Innovative and relevant knowledge from practice, research or development projects throughout Europe and other continents is presented.
Biodiversity and arthropod abundance in the upland of Leyte, Philippines
(2005) Szinicz, Gundula; Sauerborn, Joachim
In the humid tropics of SE-Asia the last primary forests are dwindling at an alarming rate. In many regions cultivated and degraded land outnumbers by far natural ecosystems. In the upland of Leyte island this is due to commercial and illegal logging activities and intensive slash-and-burn agriculture. The loss of the natural vegetation cover is accompanied by a decrease in diversity of fauna and flora, consequently also in ecosystem services and interactions, thus destabilizing the system and finally leading to degradation. To further preserve and restore natural biodiversity landscapes dominated by man need to be included in an overall research strategy. So far only few studies focus on the biodiversity of cleared and converted land adjacent to natural areas in the tropics. This study was conducted in a Philippine upland area and focused on interchanges of insects between the natural and the managed landscape. Two questions were approached. (1) Which structures and components of the cultural landscape are of significance for conserving arthropod biodiversity, and (2) are there species which originate from the natural forest and are able to become resident in the man-made systems? In order to answer these questions insect- and plant surveys as well as the movement patterns of selected insect species were examined along a gradient from the natural forest through the agricultural land. So as to define the effects of habitat destruction on the arthropod community of the research area arthropod communities of different habitats between the natural and agricultural ecosystems with increasing distance to the forest, in relation to the vegetation were compared. Insect sampling was carried out using modified Malaise traps, whereby four habitats were considered: (a) forest interior, (b) forest margin, (c) vegetable fields and (d) chayote ((Sechium edule (Jacq.) Sw. (Cucurbitaceae); the only perennial vegetable of the area) fields. These traps allowed a separate catch for each of the two arrival sides, whereby the one was always opened to the forest and the other to the field. Trapping was set up for a total of 18 months in 2001 and 2002 at three sites with the four habitats each. Arthropod diversity, composition of the arthropod community and trophic guild composition at habitats were determined for each habitat and arrival side. Obtained results are presented and discussed with regard to first: arthropod diversity and community composition along the transect from natural through agricultural systems; second: abundance patterns of selected species in natural and agricultural systems and third: abundance patterns of selected species within the agricultural land. It was found that plant diversity, vegetation structure and taxonomic composition as well as differences in the turnover of the vegetation at habitats (productivity of vegetation) influence arthropod groups and species in the study area in different ways which could not be generalised. Further, the relationships of insects between the natural forest and the open agricultural land were considered. In order to identify species that occur in the forest as well as in the open country, first, insects at sites of the forest interior, the forest margin and the agricultural land, were recorded using modified Malaise traps. Then, movement patterns of selected species were determined based on their abundances at the different habitats and arrival sides. In addition it was tried to find out whether major pest species of the cultivated crops show any relationship to the adjacent natural forest, and whether species originating from the forest (non-pest species) are able to colonize open country. The results indicate that the habitat of the pest species considered is limited to the cultivated land and does not include the forest. None of the non-pest species recorded in this study would be able to exist permanently in the agricultural area. They all depend on a closed forest habitat and therefore will become extinct as the forest disappears with proceeding slash-and-burn agriculture. However, some but not all of the pest and forest species were regularly recorded from the forest margin. Finally it was focused on relationships of insects between perennial and consecutive changing vegetable crops. Two kinds of habitats were distinguished: (i) frequently disturbed and rotational changing vegetables with simple architecture; (ii) rarely disturbed stands of chayote, with complex architecture. The impact of changing crop and weed species composition and the agricultural practices (soil preparation, planting, weeding, harvest) applied on the abundance of selected insect species and the question whether stands of chayote are used as refuge as long as conditions in the seasonal vegetables become unfavourable due to agroecosystem management applied were analysed. The insect species investigated include phytophagous specialists and generalists as well as beneficials (predators and pollinators). It only was possible to generalize movement patterns regarding significance of abundance variations at habitats and at opposite arrival sides of the traps in each habitat. With respect to the population development of the species in relation to cropping patterns and agricultural practices applied no common patterns could be determined. The results contribute to the assessment of the effects of man-made habitat conversion on the arthropod fauna in tropical ecosystems. The identification and classification of habitats and their interactions might enhance the understanding of ecosystems in order to make aware the need to preserve and restore biodiversity.
Climate variability, social capital and food security in Sub-Saharan Africa : household level assessment of potential impacts and adaptation options
(2015) Assfaw, Tesfamicheal Wossen; Berger, Thomas
Climate variability and poor distribution of rainfall often causes serious agricultural production losses and worsens food insecurity. Given that the direct effects of climate change and variability are transmitted through the agricultural sector, improving farm households capacities to adapt to the adverse effects of climate-related shocks is an important policy concern. This thesis applied a stochastic Agent-based Model (ABM) that is capable of simulating the effects of different adaptation options by capturing the dynamic changes of climate and prices, as well as the dynamic adaptive process of different farm households to the impacts of these changes. The agent-based simulations conducted in this thesis address the special challenges of climate and price variability in the context of small-scale and subsistence agriculture by capturing non-separable production and consumption decisions, as well as the role of livestock for consumption smoothing. To ensure the reliability and usefulness of results, the model was validated with reference to land-use and overall poverty levels based on observed survey values. In particular, the study used disaggregated socio-economic, price, climate and crop yield data to quantify the impacts of climate and price variability on food security and poverty at the household level. Furthermore, the study explicitly captured crop-livestock interactions and the “recursive” nature of livestock keeping when examining the effects of climate and price variability. The thesis additionally examined how specific adaptation strategies and policy interventions, especially those related to the promotion of credit, improved seed varieties, fertilizer subsidy and off-farm employment, affect the distribution of household food security and poverty outcomes. In addition to impacts on household food security and poverty, the study further considered indirect impacts through changes in the price of agricultural inputs and livestock holding. In terms of coping strategies, the simulation results in this thesis show that the effects of climate and price variability on consumption are considerable, but smaller for those households with relatively large livestock endowments. In addition, the study also found that farm households with a large plantation area of eucalyptus were able to cope with the effects of variability. Therefore, our results suggest that self-coping strategies are important but not sufficient and should be complemented with appropriate policy interventions. In terms of policy interventions, the study found that policy intervention through the expansion of credit and fertilizer subsidy along with innovation through the promotion of new crop varieties that are resilient and adapted to local conditions are the most effective adaptation options for the case of Ethiopia. In addition, the simulation results underscore that adaptation strategies composed of a portfolio of actions (such as credit and fertilizer subsidy along with new technologies) are more effective compared to a single policy intervention. For Ghana, the study suggests that if expansion of production credit is complimented by irrigation, it can provide a way to achieve food security under climate and price variability. In order to design a best-fit intervention instead of a ‘one size fits all’ approach, it is important to capture the distribution of effects across locations as well as households. The great strength of this study is its agent-based nature, which enables exploration of how effects are distributed across farm households. The simulation results clearly show that poor farms are vulnerable to climate and price variability, under which they suffer food insecurity, while a small group of wealthy farms are better off due to higher prices achieved when selling crops. The result from this thesis further underscores the need for improving adaptive capacity, as a large proportion of farm households are unable to shield themselves against the impacts of price and climate variability. In what follows, the study further applied standard micro-econometric techniques to examine the role of social capital and informal social networks on consumption insurance and adoption of risk mitigating land management practices. In particular, the thesis provides evidence of the effects of different dimensions of social capital on the adoption of soil and water conservation practices across households holding different levels of risk-aversion. The results of the study underscore that social capital plays a significant role in enhancing the adoption of improved farmland management practices and suggests that the effect of social capital across households with heterogeneous risk taking behaviour is different. Finally, by combining household panel data, weather data, self-reported health shocks and detailed social capital information, the last section is able to analyze how social capital buffers some of the implications of weather shocks.
Development and experimental validation of an agricultural robotic platform with high traction and low compaction
(2023) Reiser, David; Sharipov, Galibjon M.; Hubel, Gero; Nannen, Volker; Griepentrog, Hans W.
Some researchers expect that future agriculture will be automated by swarms of small machines. However, small and light robots have some disadvantages. They have problems generating interaction forces high enough to modify the environment (lift a stone, cultivate the soil, or transport high loads). Additionally, they have limited range and terrain mobility. One option to change this paradigm is to use spikes instead of wheels, which enter the soil to create traction. This allows high interaction forces with the soil, and the process is not limited by the weight of the vehicle. We designed a prototype for mechanical soil cultivation and weeding in agricultural fields and evaluated its efficiency. A static and dynamic test was performed to compare the energy input of the electrical motor with precise measurements of the forces on the attached tool. The results indicate that the prototype can create interaction forces of up to 2082 N with a robot weight of 90 kg. A net traction ratio of 2.31 was reached. The dynamic performance experiment generated pull forces of up to 1335 N for a sustained net traction ratio of 1.48. The overall energy efficiency ratio for the machine reached values of up to 0.54 based on the created draft force and the measured input energy consumption.
Discrete Choice Experimente zur Analyse des Entscheidungsverhaltens von Landwirten am Beispiel von Vorkaufsrechten für landwirtschaftliche Nutzflächen und Ertragsversicherungen
(2022) Moog, Kristina; Bahrs, Enno
Farmers in Germany are currently facing new challenges, which require operational adaptation and associated decisions. As a result of climate change, extreme weather events are occurring with increasing frequency, which can damage or even destroy agricultural harvests. For this reason, farmers are faced with the decision of whether and how they can protect their crops from damaging events and which instruments are best suited for this purpose. However, the increasing prices on the farmland market and the associated appearance of non-agricultural investors on the farmland market also mean that land can become more expensive for farmers. The possibility of privileging farmers towards investors in the form of pre-emptive rights, which is being discussed politically in this context, is an instrument for shaping the farmland market. This outlines the focus of this work, which is to examine the decision-making behaviour of farmers in connection with these exemplary current challenges and to determine what willingness there is on the part of farmers to pay or accept certain solutions for overcoming these decision-making challenges and what benefits these solutions have for farmers. Discrete choice experiments are used for this purpose, in which the farmers surveyed are confronted with (fictional) decision-making situations in which the preferred alternative is to be chosen from several alternatives. These alternatives are described by different attributes and levels, which are systematically varied over the entire experimental design. Subsequently, different models can be used to estimate the benefit of individual attributes and the willingness to pay or willingness to accept. Therefore, a discrete choice experiment was developed to investigate the decision-making behaviour of farmers when registering pre-emptive rights, to determine the benefits of individual pre-emptive rights attributes and the willingness-to-pay for these attributes. The results,show, that the majority of the farmers surveyed preferred to choose one of the two pre-emptive rights over the status quo. I.e. farmers derive a benefit from pre-emptive rights and show a willingness-to-pay for pre-emptive rights to farmland, both of which depend on the characteristics of the pre-emptive right, but also on the personal and operational situation of the respondent. Due to the complexity of the issue of pre-emptive rights, another discrete choice experiment was conducted to analyse the decision-making behaviour of the owners of farmland affected by pre-emptive rights. Based on the sample chosen, only owners of farmland who are farmers themselves were interviewed. Here, too, the aim is to estimate the benefits and the monetary willingness-to-accept for pre-emptive rights, this time on the part of the affected farmland owners. However, it also becomes clear that there is a monetary willingness-to-accept this, i.e. that a compensation payment is expected from the entitled party for the granting of pre-emptive rights. As in the previous studies, the benefit as well as the willingness-to-accept strongly depends on the char¬acteristics of the pre-emptive right and the personal and farm situation of the respondents. Finally, another discrete choice experiment was conducted among orchardists and vintners in Baden-Württemberg. The subject of the study is the decision-making behaviour of the orchardists and vintners surveyed regarding the conclusion of state-subsidised crop insurance policies to protect against damage due to extreme weather events. The creation of the discrete choice experiment is based on a pilot project introduced in 2019 by the state of Baden-Württemberg to promote crop insurance against extreme weather-related damage in orcharding and viticulture. Here, too, the majority of respondents decide to take up subsidised crop insurance and show a willingness to pay for crop insurance. This decision is influenced by the characteristics of the crop insurance, but also by the previous risk management of the surveyed farms. Summing up all the analyses carried out, it can be said that farmers face up to the challenges currently arising, deal with the possible solutions and, within the framework of discrete choice experiments, decide by majority in favour of these solutions and thus against the status quo.
Ecosystemic Effect Indicators to assess Effects of agricultural Landuse on Ecosystems
(2000) Merkle, Andrea Hildegard; Kaupenjohann, Martin
Agricultural production and its material and non-material emissions may cause side-effects in ecosystems. These effects have to be assessed and evaluated. The aim of the present study is to provide a tool that relates emissions of agricultural production and affected ecosystems. This tool represents an indicator approach. The needed indicators are defined as ecosystemic effect indicators (EEI). Within the study a multistage procedure is developed which should be pursued in identifying indicators. To assess which emissions must be regarded in detail an estimation of relevance by means of an emission and input classification preceeds the indicator development. Subsequently, EEI are developed for the relevant emissions and inputs. The derivation of EEI is carried out by the following steps: 1) One starts top-down at the target 'maintaining the ecosystem functioning' in this work depicted by the utility functions. A list with characteristics that are dependent on hierarchical levels is compiled for each relevant function. 2) Starting at one specific input a list of potential receptors is compiled bottom-up. These represent potential effect indicators. 3) By overlapping the lists of the steps 1 and 2 one yields EEI specific for the utility function and the input under consideration. The step 3 is performed by means of expert knowledge. The advantage of the indicator approach is its operativeness which is site-independent. The results of the study show that EEI may be deemed to be promising tools to picture human influences in particular of agricultural production on ecosystems. The results of the case study provide the basis to assess effects on ecosystems for some major stressors. In cases where critical values are available site specific quantitative statements concerning ecological effects within the frame of sustainable agriculture are enabled by the present method for the derivation of indicators. Subsequently, necessary measures can be deduced
Gamma-ray spectrometry as auxiliary information for soil mapping and its application in research for development
(2019) Reinhardt, Nadja; Hermann, Ludger
Sustainable yield increase is desperately needed for enhancing global food security, in particular, in Sub-Saharan Africa. There population growth and resulting land degradation accompany with extreme weather events. As a consequence, famines frequently occur. For planning result-oriented agricultural research for development (R4D) like in the Trans-Sec project (www.trans-sec.org), in which this thesis was embedded, local environmental, as well as social realities must be taken into account prior to any cropping experiment. Only this way, cost-efficient and adapted solutions for local subsistence farmers, but also conclusive outcomes for researchers, can be obtained. For this purpose, methods that work quick and cost-efficient are a prerequisite. In this respect, gamma-ray spectrometry as rapid soil survey method is reviewed in the first part of this thesis. Soil or geological exploration are easily accomplishable, in either airborne (with helicopters, airplanes or drones) or proximal (stationary or on-the-go) surveys. Gamma decays of the naturally occurring isotopes 40-potassium (40K), 238-uranium (238U) and 232-thorium (232Th) that appear in sufficient amounts and decay energies for field measurements are counted per time. The counts are then transferred to the respective element contents. Water and soil organic matter attenuate gamma signals, on one hand hampering signal interpretation, on the other hand indirectly enabling soil water content and peat mappings. Gamma-ray signatures of soils depend on (1) mineral composition of the bedrock, as well as (2) weathering intensity and related soil forming processes, that, in turn, influence the environmental fate of 40K, 238U and 232Th. Hence, due to soil formation heterogeneity at the landscape scale, resulting gamma signatures are locally specific and make soils readily distinguishable. In two villages in central Tanzania, participatory soil mapping in combination with gamma-ray spectrometry served as rapid and reliable approach to map local soils for later cropping experiments. Local farmers indicated major soil types on satellite images of the village area, which were the basis for further mapping steps. Fingerprint gamma-ray signatures of reference soil profiles were collected. Subsequent gamma-ray surveys on transect walks accelerated soil unit delineation for the final soil map. Challenges were misunderstandings related to language issues, variable soil knowledge of individual farmers and erosion leading to staggered soil profiles and non-distinctive signatures in some places. The combination of indigenous knowledge and gamma-ray spectrometry, nevertheless, led to a quick overview of the study area and made laboratory soil analyses largely redundant. The gained gamma-ray signal information were further statistically evaluated. For this purpose, distinction of major local soil types via K/Th ratios were graphically and statistically tested. The results showed that gamma-ray spectrometry is a sound method to distinguish certain local clay illuviation soil types by their K/Th ratios. The last part of the thesis covers the Trans-SEC approach of testing innovations for sustainable agricultural yield increase. Pearl millet (Pennisetum glaucum (L.) R.Br.) as the typical staple food in the study region was used as example crop. The process was scientist-led but local farmers selected the innovations that they considered adequate to their needs. Tied ridging for enhancing the water storage and placed fertilizer for increasing fertilizer efficiency was offered for their choice. Transferability of results from on-station experiments and demonstration plots in the village to farmers plots and trans-disciplinary issues are discussed. The number of factors that influence the result, as well as data insecurity increased with every level of spatial aggregation (on-station, demonstration plot and on-farm plots in the village). Soil type, position of the plot in the landscape (lateral water flow, distance to homesteads and, hence, fertility status) were the major influencing factors. In particular, the data insecurity related to on-farm trials due to low control intensity suggests to only conduct such experiments if large numbers of replicates (large N-trials) are feasible in future approaches. In conlusion, the thesis shows, that local knowledge combined with modern science is beneficial for agricultural R4D projects. Shortcomings within the transdisciplinary experimental approaches are pointed out. In particular, with respect to knowledge gained from the linkage of local experience and scientific approaches, there is still high potential. For this purpose, social and applied natural sciences should both strive for more interdisciplinary collaboration.
Land use change, agricultural intensification and low-carbon agricultural practices in Mato Grosso, Brazil
(2016) Dias Bernardes Gil, Juliana; Berger, Thomas
The process of land use change in Brazil has implications for food security, climate change and socioeconomic development at the local, regional and global levels. Largely driven by agricultural expansion over the past decades, such processes are likely to become even more pronounced in the coming years as Brazil is expected to satisfy a significant share of the global demand for food and energy. In an effort to prevent further forest clearance and associated greenhouse gases (GHG) emissions, the Brazilian Federal Government has been promoting agricultural intensification through farming practices able to increase crop and livestock productivity while restoring degraded lands. Particular attention has been dedicated to the beef cattle sector in Mato Grosso state, a globally important center of agricultural production in Southern Amazonia, where some of the highest crop productivity levels contrast with pastures of low average stocking rates. Two agricultural intensification strategies of growing importance in Mato Grosso are pasture to crop conversion (P2C) and integrated crop-livestock-forest systems (IS). While the first is a consequence of cropland expansion on pastures and might continue to happen through expected shifts in the relative profitability of certain commodities, the second entails the adoption of complex management practices and may be conditional on incentives and the existence of a favorable institutional context. Even though the Federal Government has already established policies and programs to promote P2C and IS and relies on both to reduce its total GHG emissions, the level of IS adoption remains low and many aspects of P2C and IS –including the drivers, barriers and impacts associated to their adoption –are poorly understood. This thesis sheds light on some of these uncertainties, elucidating where, how and why P2C and IS happen. Using a combination of qualitative and quantitative research methods such as surveys, focus groups, remote sensing, spatial econometrics and agent-based modeling, it seeks a better understanding of the interplay between farmers’ characteristics and preferences, supply chain infrastructure, market conditions and institutional factors, as well as how these may constrain or catalyze specific LUC pathways. Based on these findings, it ultimately compares the impacts of P2C and IS and concludes that the latter may offer greater benefits. The Introduction contextualizes the research questions explored in the subsequent chapters by offering an overview of land use change in Brazil and briefly reviewing the literature on agricultural intensification. The following chapters (2, 3, 4 and 5) form the core of the thesis and correspond to scientific publications developed during the Ph.D. program, all focused on Mato Grosso. Results are analyzed in an integrated manner under Discussion & Conclusion in light of the broader implications of agricultural intensification through P2C and IS, finally leading to policy recommendations. Chapter 2 quantifies P2C and investigates its drivers, revealing that: i) cattle vs. soy profitability and land prices do not fully explain P2C location; ii) land attributes on which classical agricultural development theories are based, may favour P2C but do not fully explain it; and iii) socioeconomic and institutional constraints are important in controlling pasture conversion, including non-productive sources of utility, producers’ perception of contract enforcement, land markets and P2C-related transaction costs. Chapters 3, 4 and 5 are dedicated to IS. Chapter 3 reveals the state-of-the-art of IS and how farmers perceive it, showing that: i) IS were concentrated in less than a third of the counties of Mato Grosso state –most of which were crop-livestock systems (iCL); ii) producers usually adopted one of three iCL strategies; and iii) the strategy choice was correlated with the land use transition undergone by each producer. Building on these findings, chapter 4 examines the determinants of wide-scale IS adoption and assesses the importance of household- and county-level variables, revealing that: i) adopters of iCL systems are better educated and have more access to technical assistance than specialized producers; ii) greater similarity exists between counties with iCL systems and soy-dominant vs. pasture-dominant counties; and iii) the presence of soy and pasture in a county is not a predictor of the occurrence of iCL systems. Finally, chapter 5 employs a bio-economic model that assesses how effective credit provision is in supporting the adoption of low-carbon systems –specifically IS and planted forests. The model simulates future land use changes in Mato Grosso under different credit scenarios and suggests that: i) credit has the potential to prompt greater adoption of IS; and ii) changes in the credit conditions (e.g. interest rates, down payment share and capital requirements) influence rates of IS adoption differently. Most existing studies on land use change in Brazil are limited to the debate between intensification vs. extensification and tend to project the effects of intensification at an aggregate level, overlooking the different drivers and impacts of specific intensification pathways. By exploring the particularities of IS and P2C, this work offers evidence that these are two distinct intensification strategies with widely different impacts – and, thus, should not be treated indistinguishably by policy makers. The merit of this thesis relies not only on its innovative theoretical approach, but also on its multidisciplinary and multi-scale nature. Through the mapping, measurement, description and interpretation of IS and P2C, it provides results able to inform policy making, facilitate the monitoring of existing policies and set the ground for subsequent research.
Land use management under climate change : a microeconomic analysis with emphasis on risk
(2018) Reinmuth, Evelyn; Dabbert, Stephan
This cumulative dissertation was conducted under a grant from the German Research Foundation (DFG) for the research group FOR 1695 - “Agricultural Landscapes under Global Climate Change – Processes and Feedbacks on a Regional Scale”. The goal of the sub-project from which this dissertation stems from was to explore, extend and strengthen the scientific basis for learning and risk strategies and the adaptation behavior of farmers’ economic planning decisions in crop production under the influence of climate change. The integrated bioeconomic simulation model FarmActor, was to be used as an experimental tool to develop an interdisciplinary methodological approach supported by empirical work in two study regions in Southwest Germany, the Kraichgau and the Swabian Alb. This dissertation examines risk in the context of land use management and specifically crop production. Risk in this context is related to how outcome distributions are affected by climatic influences. Risk strategies assess these contributions and account for them in the resulting decisions. The thesis is written as a cumulative dissertation and is composed of five articles. Four articles have been published by peer-reviewed journals. A fifth article has been published as a peer-reviewed conference proceeding. The article at fifth place represents the results of the main focus of this dissertation as presented in the following. Available economic models assume that farmers assess climatic risks only through yields or costs when building their land use management risk strategy for crop production. However, the available methodological approaches have been criticized for either under- or overestimating farmers’ actual behavior. In reality, and as a basis for field allocation planning, farmers have additional knowledge from monitoring crop development throughout the whole season. Yield is actually just the last point in a long sequence of (economic) evaluative observations about the production process. This influences how farmers define not only the riskiness of a yield distribution but also its costs. We hypothesize that, because it is not possible to methodologically integrate process evaluations in economic planning decisions, models lack performance, and as a consequence, it is very difficult to conduct proper research on the climate’s influences on land use management decisions. In this original research, we present a newly developed downside risk measure based on evaluations throughout the production process that can be included in the planning process as an additional parameter—so-called Annual Risk Scores. A comparative static analysis was performed to demonstrate how ARS scores assess future climatic conditions in the example of winter wheat production in the Kraichgau region as supported by empirical data. It was shown that the mechanism is sensitive to different climatic conditions. Furthermore, the ARS scores provide a different picture of climatic influence compared to an analysis based only on yields. The last article presented in this dissertation represents an integrative review that promotes more efficient model development and the reuse of newly developed methodologies in the field of integrated bio-economic simulation models. The review is based on lessons learned from working with the simulation model. Thus, the intended and outstanding full implementation of the ARS mechanism is presented in the last part of the synthesis, where we advise including the ARS scores as another constraint in the field allocation mechanisms of the FarmActor model. This is expected to improve the integration of both bio-physical and economic dimensions for complex integrated bio-economic simulation models.
Ökonomische Bewertung regionaler Wettbewerbspotentiale verschiedener landwirtschaftlicher Biomassen im Rahmen der Bioökonomie unter besonderer Berücksichtigung Baden-Württembergs
(2020) Petig, Eckart; Bahrs, Enno
The finite nature of fossil resources and climate change pose major challenges to the global society and require a comprehensive transformation of the current economic system. One important aspect of this transformation, also known as bioeconomy, is the transition from a fossil-based to a bio-based supply of raw materials. In this context, agricultural production represents an important supplier of raw materials, which in Germany is already characterized by a strong competition for the scarce land. The scarce land is a major challenge of the expansion of the use of agricultural biomass for the bioeconomy. Accordingly, the derivation of the potential of agricultural biomass for bioeconomy requires consideration of the tradeoffs between various utilization paths. In this context, economic models can be valuable methods, which on one hand are able to depict the trade-offs of different value chains and can, on the other hand, incorporate the uncertainty by developing suitable scenarios. The aim of this thesis is the evaluation of the potential of different agricultural biomasses for the bioeconomy and to analyze the associated effects on agricultural production structures in Baden-Wuerttemberg. In chapter 2 the potential of grassland as a biogas substrate is evaluated, which might be important for the bioeconomy in the future. Due to the more complex harvesting process and partly unfavorable production conditions, grassland has higher production costs compared to arable biogas substrates. The consideration of iLUC Factors with high prices for GHG emissions could improve the competitiveness of grassland to such an extent that it is competitive with the production of biogas substrates on arable land. However, silage maize is often the more favorable biogas substrate in many respects, as chapter 3 shows by means of a site modeling for biogas plants in Baden-Wuerttemberg. In chapter 4 and 5 the potential of straw for energetic and material use is analyzed. These investigations are based on the combination of EFEM with the techno-economic location optimization model BIOLOCATE. The results clearly show the interaction between the economies of scale and the rising raw material supply costs. On the one hand, the average investment costs decrease with increasing plant size, but on the other hand the raw material costs increase, because the transport distances increase and an increasing demand for biomass results also in higher market prices. Additionally, the results show that straw can make a fundamental contribution to the bioeconomy by providing regional bioenergy and as feedstock for material value chains. However, even the use of by-products can have effects on cultivation structures and thus, reduce the production of agricultural biogas substrates, among other things. In Chapter 6 the effects of macroeconomic expansion paths of the bioeconomy on agricultural production structures in Baden-Wuerttemberg are investigated. For this purpose, the results of an iterative model coupling between the agricultural sector model ESIM and the energy sector model TIMES-PanEU of four bioeconomic scenarios are scaled down from national level to regional and farm level using EFEM. The results show different impacts on farm types and thus illustrate the advantages of a differentiated analysis of the expansion of the bioeconomy. Therefore, farms with mainly extensive production methods such as suckler cow husbandry do not profit from the expansion of the bioeconomy due to unfavorable production conditions, while especially large arable farms in fertile regions would benefit disproportional more than the average. Basically, the results reveal limits to the mobilization of additional biomass potential. The reason for this is the already high cultivation intensity of agricultural production in Germany, in which the expansion of one production restricts production of another due to competition for the limited agricultural land. For grassland, the results show that the decline in grassland-based cattle farming and unfavorable economic conditions can lead to a significant increase of unused grassland. Grassland thus presents itself as a promising resource for biomass production for the bioeconomy, as it can provide important ecosystem services (e.g. biodiversity) in addition to the provision of raw materials. However, a political framework has to be established that promotes ecological services accordingly. Finally, in chapter 7 additional research needs are identified, which include further development of the methodological approach. These comprise an extension of the analysis by macroeconomic models to integrate interactions with the material use in a more detailed way. Furthermore, an integration of ecological parameters is necessary for a holistic analysis in the context of bioeconomy.
Qualitativer Vergleich von Modellen zur Bewertung von Klimaschutzmaßnahmen in Europa unter besonderer Berücksichtigung der Landwirtschaft
(2006) Vabitsch, Anna Maria; Zeddies, Jürgen
Agriculture in Europe is responsible for a considerable fraction of greenhouse gas emissions. Methane, nitrous oxide and carbon dioxide emissions from agricultural sources account for about 10% of the total European greenhouse gas emissions. The contribution that agriculture can and should make to the achievement of the agreed European goals for emission reductions has to be assessed. The aim of this study is to analyse the possibilities and conditions for greenhouse gas mitigation in the agricultural sector in comparison to other economic sectors. It addresses the question of how meaningful and efficient it is to reduce greenhouse gas emissions from farming. A review of the literature showed that various measures for emissions reductions are available for agriculture as well as for the other sectors. In order to assess the efficiency of these mitigation measures, a quantification of abatement costs is necessary. For this purpose, economic-ecological models were chosen which were developed mostly for political advice and analysis. A detailed analysis and assessment of the chosen models was carried out in order to evaluate the model results. The comparative assessment of model results arrives at the conclusion that there is presently no model available that satisfies all the requirements demanded of an environmental indicator for climate policy. For this comparison of models, a selection of representative models was described and analysed in detail. The following models were chosen for the detailed analysis and assessment: POLES, MERGE, EPPA-EU, PRIMES / GENESIS, RAINS / GAINS, CAPRI, AROPA GHG and RAUMIS. They were differentiated between highly aggregated models which represent the global economy with its impacts on the climate system and, in contrast, disaggregated models which focus on a single sector and/or region. Two categories of model structures were observed: general and partial equilibrium models based on the neo-classical economic theory of perfect markets and, on the other hand, optimisation models which were solved by the maximisation of (regionally weighted) profit and benefit. An important feature which distinguishes between the models is the sectoral and material resolution. Aggregated energy models are commonly used, most of which not only reproduce the energy sector, but also the other sectors. However, they only account for energy-related CO2 emissions. These models provide important information on the most relevant emitting sector (energy) and the most important greenhouse gas (CO2), but they neglect the presence of the other Kyoto-gases and the possibilities of an integrated approach for emission reductions. The results of assessments of mitigation potential in the agricultural sector using energy models are incomplete because the relevance of non-CO2 emissions and their possible contribution to overall emission reductions are disregarded. As a second focus models of the agricultural sector were analysed and assessed. These models describe the agricultural production process with a high degree of resolution and determine specific mitigation costs of single measures and options. Additionally, some of these models assess the interactions and effects of simultaneously reducing emissions of different greenhouse gases. However, the problem still exists that results from models of different sectors are not comparable with one another. The main reasons for this are the varying model assumptions and the specific conditions. A method to resolve this dilemma is provided by the models that integrate top-down and bottom-up elements in one model framework. This means that several sectors and countries are simultaneously modelled (top-down) but detailed information on specific gases and mitigation options is integrated as well (bottom-up). Using this procedure, the comparison of different sectors is possible and sector-specific accuracy in the definition of abatement costs, for instance, is also achieved. This procedure is most advanced in the case of integrated assessment models. This approach aims to account for as many aspects as possible of one environmental problem as well as for all its interactions and impacts on other environmental goals. At present, these very complex model systems are most readily applicable to find solutions for the optimal spatial, temporal and material allocation of mitigation measures and investment. The significance of these model results is, of course, also dependent on the available database and on the assumptions made. These models come to the conclusion, among other things, that the integration of agricultural greenhouse gas emissions into a holistic mitigation approach may provide a significant reduction in mitigation costs. Despite the high level of uncertainties regarding the model results, it can be concluded that the agricultural sector should definitely contribute to achieving the agreed emission reductions.
Social assessment of miscanthus cultivation in Croatia: Assessing farmers' preferences and willingness to cultivate the crop
(2023) Marting Vidaurre, Nirvana A.; Jurišić, Vanja; Bieling, Claudia; Magenau, Elena; Wagner, Moritz; Kiesel, Andreas; Lewandowski, Iris
Social aspects of miscanthus cultivation have been investigated in a limited way in the scientific literature. Adopting existing frameworks for social life‐cycle assessment enables assessments to include numerous social aspects; however, the relevance of these aspects depends on the local context. This study aims to identify the most relevant social aspects from the farmers' perspective using a previously proposed framework for the assessment of the stakeholder ‘farmer’. It is based on a case study for miscanthus production in Sisak Moslavina in Croatia. The existence of abandoned lands in Croatia presents an opportunity for the cultivation of miscanthus as a potential source of biomass for the production of bio‐based materials and fuels. The study seeks to assess the feasibility of cultivating miscanthus in the region, taking into account potential challenges and opportunities, as well as farmers' willingness to adopt the crop, and to understand the reasons behind land abandonment. We conducted a survey among 44 farmers in the region and used a scoring method to identify the most relevant social aspects. The aspects most valued by the farmers were health and safety, access to water, land consolidation and rights, income and local employment, and food security. Responses to the question of whether they would adopt the crop highlight the importance of an established market, good trading conditions and profitability of cultivation. The survey also enabled an understanding of farmers' preferences with respect to the production conditions of crops. The farmers regarded the provision of subsidies as one of the main factors that render a crop attractive. Opportunities for the adoption of the miscanthus cultivation include high yields and low input requirements. Barriers include land conflicts and land availability. Despite the opportunities for miscanthus development in the region, there are important challenges to consider for successful implementation of the crop.
Sozio-ökonomische Beurteilung von Innovationen: Untersuchungen über die Innovationenakzeptanz auf Betriebs-Haushaltsebene in Niger
(2004) Haigis, Jörg; Heidhues, Franz
The presented research study deals with the question, which socio- economic and personal characteristics of the heads of household as the main decision persons within the nigerian farm-household-systems influence significantly their adoption behaviour. Simultaneous innovation adoption of thirteen selected different new technologies were in the focus of the study. The study emphasizes especially the time of the adoption state, which could be observed for all considered innovations by all investigated heads of household at a certain reference point of time. The reference point of time is the year 1995. The analysis of the selected farm-household-systems produced an erratic use for most of the thirteen considered innovations over time until first adoption. Simultaneously the adoption behaviour of the household chiefs show a distinct regional emphasis in terms of the adopted technology type. These emphasis merely reflect rudimentary the climatical site conditions in the republic of Niger. They correspond only apparently the climate gradient of the research sites. At drier sites there the households favour particularly resource saving innovations, for which an internal input availability exist. In contrast the farmers put their emphasis on the adoption of labour-saving technologies at the climatical favourable sites. With a closer look there are less the climatical conditions which influence this behaviour than local particularities, especially within the farm-household-systems. Above all this particularities are the limited access of agricultural active women to use the household labour force for the work on their fields. Exclusively women cultivate groundnuts in this region. Thereby the groundnut cultivation is the main activity within the crop production. Groundnut production is predominantly for the women a profitable business through processing. Because of these circumstances in this region exist a well funded demand for wage labour to prepare groundnut fields with animal-drawn implements. The temporal discontinuity of an adopted innovation is found especially for external and yearly obtainable inputs. Accordingly the cumulative behaviour of each household chief show a variable mixture of actual, former and never occurred adoption. Five adopter groups can be found within this complex appearing behaviour situation with the help of cluster analysis methods. The group-specific adoption behaviour rises in an order from low until especially innovative. Except of the low innovative household chiefs, each adopter group show a significant technological emphasis in terms of the type of adopted technologies. This emphasis coincide with the regional one. The order of the adoption behaviour does not correspond with the climate gradient. Neither a comparison of the identified adopter groups with variance analysis nor the econometric analysis using a multi-nomial logit-model resulted in a clear finding that personal or socio-economic characteristics of the household chief influence significantly their adoption behaviour. In fact the results of the logistic regression confirm a high dependency from the location for the observable adoption behaviour. The distinct regional division between high and special innovative household heads on the one side opposite to all others indicates a significant influence on the individual adoption behaviour by local and regional factors. But the question could not be resolved in the context of this farm-household-system based study, wherein these factors are in detail. The adoption of technological innovations shows not only a distinct regional emphasis and a partly temporal discontinuity but also it is characterised by an adaptation in terms of the spatial use of adopted technologies. The farmers cultivate their fields not homogeneously over the whole field area. Rather they apply a kind of site-specific cul¬tivation. In doing so they adapt each cropping measure to the site conditions changing on a small-scale within in a field. This spatial adaptation includes also the adopted innovations. The observable adoption behaviour of the household chiefs points up the basic willingness to use new technologies and with it the change of the previous traditional cropping methods. The identified particularities of the innovation adoption confirm on the one hand the significant adaptation ability of the farmers to the particular local and temporal conditions. On the other hand these particularities are an indication of the inadequate adaptation of the recommended innovations. As a result the success of further efforts to modernise the nigerian agricultural farms depends greatly from the stronger consideration of these particularities in the future development and diffusion of new technologies.
Technikfolgenabschätzung und Diffusionsforschung in der Landwirtschaft : Beschreibung, Analyse und Weiterentwicklung im Kontext der Einführung Automatisierter Melkverfahren
(2009) Hein, Klaus A.; Grosskopf, Werner
With the fully automatic milking systems (AMS), we have a technique available to perform the milking process largely independent from the dairy farmer for the first time. On German farms we can observe first utilization of this innovation since the mid-nineties. The complexity of technical innovations in farming that is shown in the AMS has led to a higher interest in the subsequent effects of increased mechanization. A concept of a comprehensive analysis of the technological impact for AMS doesn?t exist so far. Further, AMS have not been described in terms of their classification within innovation-theory yet. At the same time, we get the impression that with the adoption process of the AMS technology, limitations of the traditional demand-based theory become obvious in real-ity. Based on this knowledge, we have to confront the agricultural economic research with the task to carefully investigate the explanatory-models for the development, impact and expan-sion of technical advancement as a basis of a technological assessment for AMS. The objec-tive of this thesis is to investigate the diffusion process of innovations in farming following the example of introducing fully automated milking systems on the market. Coming from observations of innovation processes in the context of various models based on innovation and economic theory, certain approaches and methods for the technological assessment in farming will be discussed against the background of theories to analyse technical advancement. The gained insights will be combined in the development of an overall concept for the analysis of the technical impact for fully automated milking systems. Part of the analysis of technical impact for AMS is to capture the motivation of potential users to adopt this new technology in an empirical study. The available results from literature were supplemented by a written survey of 5.210 dairy farms in four German dairy farming areas. The high investment costs of AMS are the main obstacle for this innovation at the moment. Also the associated costs for adaptation of the milking technique as well as the expectation of a high maintenance effort are important arguments from non-adopters against an investment in AMS. Social arguments are on the other hand the main factors for potential adopters in their decision making process. Possible examples are health aspects or the expected flexibility and time saving. Another reason can be found in the pursuit for greater independence from contract workforce. Therefore it can be shown, that even if the relative cost of purchasing AMS is higher than its relative productivity, we still see adoption of the innovative milking technique based on individual benefits. With the introduction of the individual benefit theory in the decision-making process of competitive techniques, it is now possible to explain the diffusion of AMS, even though the adoption of AMS in terms of maximizing profit would have to be rejected in the single case. A further specification of the decision-making factors with regards to personal benefits could be very helpful for ex ante estimations of diffusion processes in agriculture. For the majority of potential users of AMS we can assume that expectations of performance and profit will outweigh the mostly social and economical benefits expected in the long term. This insight is opposed to the expected S-shaped distribution of AMS adopters. Contrary to the present tradition of demand-based diffusion research, for AMS we were able to prove a diffusion process that is determined more by supply-side. Due to the fact of increased com-plexity of innovations in the diffusion processes, where processes are more and more described in terms of industrial coordination, one should give up the onesided emphasis of socio-economical characteristics of potential adopters in favour of a growing supply-oriented diffusion research. Accordingly, we also have to expand future technological assessments specifically on manufacturers of these innovations. All in all, we are not able to explain the diffusion of AMS sufficiently with the concept of factorprice-induced technical change. This is also shown in the fact that in spite of the introduction of AMS, we don?t necessarily use more effective capital in dairy farms. The question, if we can see AMS as a technical advancement from an economical point of view, is therefore dependent on the individual circumstances for their use on dairy farms. In view of the future development we can therefore realize, that we won?t see big changes in the structure of the dairy farms that can be traced back to the introduction of this technology.
The role of social protection and agriculture for improved nutrition in Ethiopia
(2022) Bahru, Bezawit Adugna; Zeller, Manfred
Nahezu alle Nationen haben sich im Rahmen der Sustainable Development Goals (SDGs) verpflichtet, die Welt bis 2030 von Hunger und Armut zu befreien. Bei der Reduzierung von Armut und Hunger wurden erhebliche Fortschritte erzielt. Dennoch lebt ein erheblicher Teil der Menschen im globalen Süden, vor allem in ländlichen Gebieten, immer noch in Armut, hungert und leidet unter Mangelernährung. Sozialer Schutz und eine ernährungssensitive Landwirtschaft gehören zu den Strategien, die von mehreren Ländern umgesetzt werden, um Armut, Ernährungsunsicherheit und Mangelernährung zu lindern. Während es einen Konsens über die Auswirkungen von sozialen Sicherungssystemen auf Armut gibt, sind die Erkenntnisse über ihre Auswirkungen auf Landwirtschaft, Ernährungssicherheit und Ernährung nicht eindeutig. Darüber hinaus ist die Wirkung von ernährungssensitiven landwirtschaftlichen Interventionen, insbesondere die Rolle der Produktionsdiversifizierung, auf die Verbesserung der Ernährung von Kleinbauern nicht gründlich untersucht. Äthiopien stellt eine interessante Fallstudie dar, um die Rolle von Sozialschutz und ernährungssensitiver Landwirtschaft auf das Wohlergehen von Haushalten zu untersuchen. Äthiopien hat eines der größten Sozialschutzprogramme in Afrika, das Productive Safety Net Program (PSNP). In jüngster Zeit hat Äthiopien auch mehrere Anstrengungen unternommen, um die Landwirtschaft und Maßnahmen zur sozialen Sicherung ernährungssensitiv zu gestalten. Darüber hinaus ist das Land nicht nur eine der am schnellsten wachsenden Volkswirtschaften derWelt, sondern weist auch hohe Raten an Armut, Ernährungsunsicherheit und Unterernährung auf. AmBeispiel Äthiopiens werden in dieser Dissertation die Auswirkungen des PSNP auf die Landwirtschaft, die Ernährungssicherheit und die Ernährung sowie die Auswirkungen der landwirtschaftlichen Diversifizierung auf die Ernährung von Haushalten und Kindern untersucht. Zu diesem Zweck werden zwei Längsschnittdatensätze aus Äthiopien verwendet - die Living Standard Measurement Study - Integrated Surveys on Agriculture und die Young Lives Kohortenstudie. Diese Arbeit ist in sechs Kapitel gegliedert. Kapitel 1 stellt den konzeptionellen Rahmen vor und hebt die Zusammenhänge zwischen Sozialschutz, Landwirtschaft und Ernährung hervor. Kapitel 2 informiert über die Datenquellen und die in den folgenden drei Kapiteln verwendeten Identifikationsstrategien. Kapitel 3 evaluiert die Auswirkungen einer Sozialschutzmaßnahme auf eine Reihe von landwirtschaftlichen Ergebnissen. Kapitel 4 analysiert die Rolle von landwirtschaftlicher Diversifizierung auf die Ernährungssituation von Haushalten und Kindern. Kapitel 5 schätzt die Auswirkungen des PSNP auf die Ernährungssicherheit der Haushalte und die Ernährung der Kinder. Kapitel 6 schließt mit politischen und methodischen Implikationen und skizziert Empfehlungen für zukünftige Forschung. Seit 2005 hat Äthiopien seine Sozialschutzstrategie von Hilfsmaßnahmen, die hauptsächlich aus einer Ad-hoc-Verteilung von Nahrungsmitteln/Bargeld nach Dürren bestehen, auf ein entwicklungsorientiertes Sozialschutzprogramm namens Productive Safety Net (PSNP) umgestellt. PSNP bietet Geld- und Sachmitteltransfers für Arbeitsleistungen in öffentlichen Arbeitsprojekten wie Straßen, Bewässerung, Schulen, Krankenhäuser und Ausbildungszentren für Bauern. Ergänzt wird das Programm durch Vermögensaufbau, die das Ziel haben, den Lebensunterhalt der beteiligten Haushalte zu verbessern. Daher könnte die Teilnahme der Haushalte am PSNP die landwirtschaftliche Produktion zu verbessern, indem Liquiditäts- und Kreditbeschränkungen gemildert werden, Sicherheiten erhöht werden, eine Versicherung gegen Risiken besteht, der Zugang zu Betriebsmitteln und Agrarmärkten verbessert wird und gemeinschaftliche landwirtschaftliche Vermögen aufgebaut werden. Kapitel 3 bewertet die Auswirkungen des PSNP auf den Besitz von Produktionsmitteln, die Einführung von verbessertem Saatgut und Düngemitteln, die Vielfalt von Nutzpflanzen und Viehbeständen, Beratungsdienste und die Kontrolle von Frauen über Ressourcen durch die Anwendung einer gezielten Maximum-Likelihood-Schätzung. Der Artikel trägt zur Literatur bei, indem er eine Reihe von Ergebnissen entlang der kausalen Zusammenhänge berücksichtigt und eine Methode einsetzt, die Algorithmen des maschinellen Lernens verwendet. Das Modell liefert Schätzungen, die weniger anfällig für Fehlspezifikationen und Ausreißer sind. Die Ergebnisse zeigen, dass die PSNP-Teilnahme den Besitz von landwirtschaftlichen Werkzeugen, denWert von Viehverkäufen, den Anteil des Haushaltseinkommens aus außerlandwirtschaftlichen Quellen, die für landwirtschaftliche Arbeiten aufgewendete Zeit und den Zugang zu Krediten auf Haushaltsebene erhöht. Darüber hinaus verbessert die PSNP-Teilnahme den Zugang der Gemeinschaft zu Bewässerung und Beratungsleistungen zum Management natürlicher Ressourcen sowie den Zugang der Haushalte zu Krediten, die Ernteproduktion und die Viehzucht. Die PSNP-Teilnahme hat jedoch keinen Einfluss auf die Nutzung von Technologien, die Kontrolle der Frauen über das Einkommen, die Ernte und den Viehbestand sowie den Zugang zu Beratungsdiensten auf Haushaltsebene. Die Ergebnisse zeigen auch, dass PSNP-Teilnehmer eine geringere Ausstattung mit langlebigen Vermögenswerten, Humankapital und Land haben, was einen verbesserten Zugang der Gemeinschaft zu Betriebsmitteln und Beratungsdiensten zur Verbesserung der landwirtschaftlichen Ergebnisse behindern könnte. Diese Ergebnisse unterstreichen die Notwendigkeit, Interventionen auf Haushaltsebene zu integrieren, die die Ausstattung der Haushalte anheben könnten, um eine Vermögensschwelle zu schaffen, die die produktive Nutzung des geschaffenen Gemeinschaftsvermögens ermöglicht. Eine Möglichkeit, dies zu erreichen, könnte darin bestehen, Bargeld-/Sachmitteltransfers durch einen gut konzipierten Vermögenstransfer zu ergänzen. Andere Studien haben Verzögerungen und Unterbezahlung von berechtigten öffentlichen Arbeitstransfers gezeigt. Daher ist die Verbesserung der Pünktlichkeit und des Umfangs von Geld-/Sachleistungenebenfalls entscheidend, um Auswirkungen auf die Landwirtschaft zu erzielen. Dadurch kann dieWirkung des PSNP über die Verbesserung des Zugangs der Gemeinden zu Betriebsmitteln hinausgehen und die landwirtschaftliche Entwicklung fördern, was letztlich die Lebensbedingungen im ländlichen Raum verbessert. Die Landwirtschaft als Quelle von Nahrung und Lebensunterhalt für Hungernde und Unterernährte spielt eine wichtige Rolle bei der Linderung von Unterernährung und den damit verbundenen Folgen für das Wohlergehen. Insbesondere in einem Kontext, in dem die Subsistenzlandwirtschaft einen großen Teil der landwirtschaftlichen Produktion ausmacht und in dem die Marktteilnahme durch Marktversagen behindert wird, spielt die Eigenproduktion eine entscheidende Rolle für die Ernährungssicherheit der Haushalte und die Ernährungsergebnisse. Die Beweise dafür, ob die Produktionsvielfalt die Ernährung verbessert, sind nicht eindeutig. Sie stützen sich größtenteils auf Studien, die sich nicht mit der endogenen Beziehung zwischen Produktionsund Konsumentscheidungen befasst haben. Um diese Forschungslücke zu schließen, analysiert Kapitel 4 die Auswirkungen der Produktionsvielfalt auf die Ernährung der Haushalte und die Unterernährung von Kindern. Um die Endogenität dieser Auswirkungen zu berücksichtigen, wird ein Instrumentalvariablenansatz gewählt Die Ergebnisse zeigen, dass die Produktionsvielfalt mit Verbesserungen in der Ernährung der Haushalte verbunden ist, nicht aber mit chronischer Unterernährung von Kindern. Die positiven Effekte könnten über drei möglicheWege zustande kommen: Konsum, verbesserte Agrarökologie aufgrund der Produktionsdiversifizierung und verbesserte Risikotragfähigkeit. Der Artikel findet einen höheren Konsum von nährstoffreicheren Lebensmitteln (Eier, Fisch, Früchte, Hülsenfrüchte/Nüsse/Samen, Fleisch,Wurzeln, Knollen, Milch, Milchprodukte und Gemüse) in Haushalten mit höherer Produktionsvielfalt. Dennoch ist die Produktionsdiversifizierung über sieben Lebensmittelgruppen hinaus negativ mit der Ernährung der Haushalte verbunden. Dies könnte auf entgangene Einkommensvorteile durch Spezialisierung zurückzuführen sein. Was die Rolle der Märkte betrifft, so wurde gezeigt, dass der Marktzugang die Ernährungsvielfalt der Haushalte verbessert, selbst wenn die Produktionsvielfalt hoch ist. Unsere Analyse der Rolle der Marktteilnahme zeigt einen positiven Einfluss der Marktteilnahme auf die Ernährung der Haushalte, findet aber keinen Einfluss auf die Ernährung der Kinder. Angesichts der Tatsache, dass ein durchschnittlicher Landwirt in unserer Stichprobe etwa sechs Gruppen von Nahrungsmitteln produziert, dürfte die Förderung einer größeren Produktionsvielfalt negative Auswirkungen auf die Ernährung der Haushalte haben. Daher sollten sich politische Maßnahmen zur Verbesserung der Ernährung von Kleinbauern darauf konzentrieren, die Bedingungen für die Marktteilnahme zu verbessern, anstatt die Produktionsvielfalt zu erhöhen. Während es zahlreiche Belege für die Auswirkungen von Maßnahmen zur sozialen Sicherung auf die Armut gibt, ist ihre Rolle bei der Bekämpfung der eigentlichen Ursachen und Erscheinungsformen von Armut, wie z. B. der Unterernährung von Kindern, nicht gut dokumentiert. Dazu stammen die verfügbaren Erkenntnisse über die Auswirkungen von Maßnahmen zur sozialen Sicherung auf die Ernährungssicherheit von Haushalten und die Ernährung von Kindern aus Programmen in lateinamerikanischen Ländern, die mit unterschiedlichen institutionellen Kapazitäten und Umsetzungsmodalitäten durchgeführt wurden. Darüber hinaus ist die Evidenz, ob Maßnahmen zur sozialen Sicherung die Kinderernährung beeinflussen, nicht schlüssig. Auch in Äthiopien lieferten die wenigen Studien, die die Auswirkungen von Maßnahmen zur sozialen Sicherung auf die Ernährung von Kindern und die Ernährungssicherheit von Haushalten untersuchten, gemischte Erkenntnisse. In diesen Studien wurden Methoden verwendet, die anfällig für Verzerrungen durch zeitvariable Störfaktoren sind, die mit dem Programmdesign und der Implementierung zusammenhängen. In Kapitel 5 wird diese verbleibende Lücke geschlossen, indem die Auswirkungen des PSNP auf die Ernährungssicherheit von Haushalten und die Ernährung von Kindern untersucht wird. Dazu werden marginale Strukturmodelle angewandt, die nicht nur für zeitvariante, sondern auch für zeitinvariante Einflussfaktoren adjustieren. Die Studie stellt fest, dass die Teilnahme am PSNP zwar die Häufigkeit der Mahlzeiten für Kinder erhöht, aber keinen Einfluss auf die Ernährungssicherheit der Haushalte und die Ernährungsvielfalt der Kinder, die z-Scores für die Körpergröße, den Body-Mass-Index, und dieWahrscheinlichkeit vonWachstumshemmung und Untergewicht hat. Es wird außerdem festgestellt, dass wichtige Determinanten für die Kinderernährung, wie z.B. die Bildung der Mutter, die Ernährungsvielfalt des Kindes, die Ernährungssicherheit des Haushalts, das langfristige Vermögen, die Ausgaben und der Ernährungszustand während des 1.000-Tage-Fensters bei den Kindern in den Haushalten der PSNP-Teilnehmer niedriger sind. Darüber hinaus weisen Experten darauf hin, dass die Integration von Maßnahmen zur sozialen Sicherung mit anderen sektoralen Programmen entscheidend ist, um Auswirkungen auf die Ernährung zu erzielen. Solche Integrationen fehlen bei der Umsetzung des PSNP. Es wird daher empfohlen, das PSNP mit anderen sektoralen Programmen zu integrieren, die ernährungsspezifisch und ernährungssensitiv sind. Zu den bewährten Interventionen gehören unter anderem die Förderung des Zugangs zu sauberem Wasser und sanitären Einrichtungen, der Zugang zu Gesundheitsdiensten, die Stärkung der Rolle der Frau, Ernährungserziehung und die Einführung landwirtschaftlicher Technologien. Zusammenfassend lässt sich sagen, dass diese Arbeit am Beispiel Äthiopiens einen Beitrag zur wachsenden Literatur über die Wirkungsevaluierung von Programmen zur Erreichung der Nachhaltigen Entwicklungsziele bis 2030 leistet. Dies wird durch die Anwendung neuer Techniken in der Wirkungsevaluation mit beobachtenden Studien erreicht, einschließlich solcher Techniken, die integrierte Lernalgorithmen verwenden. Sie zeigt, dass sich eine höhere Produktionsvielfalt negativ auf die Ernährung der Haushalte auswirkt, während Marktzugang und -teilnahme die Ernährung der Haushalte verbessern. Daher könnte die Verbesserung der Bedingungen für die Marktteilnahme und die verstärkte Teilnahme an Märkten einer derWege sein, über den die Landwirtschaft die Ernährung verbessert, insbesondere in Kontexten, in denen die Produktion bereits ausreichend diversifiziert ist. Die Studie zeigt auch, dass trotz des Potenzials von Maßnahmen zur sozialen Sicherung, die Ursache von Armut zu bekämpfen, indem sie die Lebensgrundlage von Haushalten verbessern und den generationenübergreifenden Kreislauf der Armut durchbrechen, diese Auswirkungen in einem der größten Sozialschutzprogramme Afrikas weitgehend ausbleiben. Um diese Einschränkungen zu beheben und den Beitrag des PSNP über die begrenzten Auswirkungen auf Ernährung und Landwirtschaft hinaus zu erhöhen, wird die Integration von ernährungssensitiven Interventionen und gut konzipierten Vermögenstransferprogrammen empfohlen.
Turbulent exchange of energy, water and carbon between crop canopies and the atmosphere : an evaluation of multi-year, multi-site eddy covariance data
(2019) Eshonkulov, Ravshan; Streck, Thilo
The increase of anthropogenic CO2 emissions and other greenhouse gases has raised concern about climate change. Climate change has manifold impacts on yield and yield quality, crop rotations, carbon and nitrogen cycling, water regime and agricultural production systems. To understand its consequences on environmental systems, measuring the matter and energy exchange at the land surface provides data to help validate and inform a wide range of process models. Such flux measurements at the land-surface provide an opportunity to test simulations of processes in the soil-plant-atmosphere continuum. Currently, such measurements are mainly based on the eddy covariance (EC) method, for the quality of which the energy balance closure (EBC) is a problem. The EBC significantly influences the calibration and validity of land-surface models, especially in regard to the energy and water balance at the Earth’s surface. The EBC quantifies the deviation between turbulent fluxes and available energy. It is crucial to obtain high-quality EC measurements to determine the reasons for the EBC. The research aims of this dissertation were: 1) to clarify the role of minor storage and flux terms in the energy balance, 2) to determine the possible reasons for the energy imbalance using a long-term dataset (2010-2017) from agricultural croplands, and 3) to investigate the effects of region, site, year and crop type on carbon fluxes and budgets. In the first study (Chapter 2) the contribution of minor storage terms to the EBC were investigated. I also determined the contribution of ground heat fluxes calculated by different methods. A harmonic analysis method was used to calculate ground heat fluxes from measurements of heat flux plates and soil temperature sensors. Soil heat storage and enthalpy change in the plant canopy were determined at different locations within the EC footprint. Considering minor storage terms improved the energy balance closure on average by 5.0 % in 2015 and by 6.8 % in 2016. The greatest energy balance closure improvement occurred in May of both study years. The dominant fraction of minor energy storage was energy uptake and release through photosynthesis and respiration. Additionally, the energy fluxes related to soil temperature change were also observed. The ground heat flux calculated by harmonic analysis from soil heat flux plates narrowed the EBC by 3 % compared to the calorimetric method. The results indicated that the typical correction approach to achieve energy balance closure, i.e. the Bowen-ratio method, overestimated the turbulent fluxes. The second study (Chapter 3) investigated the effects of crop type, site characteristics, wind directions, atmospheric conditions and footprint on the EBC. The long-term evaluation of EC measurements showed that, with the EC method, 25 % of the available energy could not be detected. Decreasing the flux footprint area increases the chance of a more homogeneous area. Homogeneity plays an important role in achieving a better energy balance closure. The synthesis of long-term EC data indicated that the sonic anemometer is very sensitive to orientation, not allowing accurate measurements from all wind directions. Discarding the measurements from wind directions 0° and 90° at EC4 improved the EBC from 80 to 84 %. In the third study, presented in Chapter 4, a long-term and multi-site experiment was evaluated to clarify the effects of site, year and region on the CO2 fluxes and budgets in agroecosystems. The net ecosystem exchange of CO2 fluxes – measured on six sites during eight years – was comprehensively examined. Winter rapeseed had the lowest CO2 uptake, cropping of silage maize resulted in the highest C losses. The management of harvest residues was the most effective means of controlling the C budgets. Comparing the CO2 fluxes processed with the recently developed ogive optimization method versus the conventional calculation showed that eliminating low-frequency contributions had a considerable effect. On average, the ogive optimization method delivered 6.9 % higher net ecosystem exchange rates than the conventional method. This dissertation provides new insights into how to obtain better measurements of matter and energy fluxes from EC measurements by a) considering storage terms otherwise neglected, b) using harmonic analysis for calculating ground heat fluxes, c) discarding fluxes from behind the anemometer and d) applying the ogive optimization method.