E-Dissertationen: E-Dissertationen: Recent submissions
Now showing items 381-400 of 1107
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Effects of warmer winters due to climate change on chilling and dormancy release of sweet cherry
(2018-10-16)The main objective was to contribute to dormancy research by one the one hand investigating the chilling and forcing requirements of sweet cherry trees in one of the major fruit growing regions in Germany and on the other ... -
Genome-wide-association studies (GWAS) on the interaction between the cyst nematode Heterodera schachtii and Arabidopsis thaliana
(2018-10-12)Plant-parasitic cyst nematodes are obligate sedentary parasites that infect the roots of a wide range of host plants. In research, the beet cyst nematode Heterodera schachtii infecting Arabidopsis thaliana is often used ... -
The Effect of Government Transfers on Poverty and Inequality: Three Different Perspectives about Decentralization and Social Policies in Bolivia
(2018-10-12)Poverty and inequality in Bolivia have reduced to a great extent in the last 20 years in Bolivia. There are mixed opinions regarding the role of the state in this overall positive result, and consistent evidence of state ... -
Allocation of Payments for Environmental Services through auctions & the role of social interaction
(2018-09-28)This thesis contributes to the study of the use of auctions in the allocation of contracts of payments for environmental services. The focus of the research is on the role of social interaction as a learning source for ... -
Farm-level impacts of policy instruments targeting plant protection products
(2018-09-25)Plant protection is necessary to achieve high yields with high quality. The application of pesticides, however, leads to negative external effects to the environment. Society calls for stricter agri-environmental instruments ... -
Investment and land-use decision under consideration of uncertainty
(2018-09-17)Investment and land use decisions pre-determine the distribution of other farm resources and thus constitute core farm activities. Investments at the farm level often include sunk costs, risks, returns-to-scale, investment ... -
The impact on meat quality of strategies to improve feed conversion efficiency in pigs and the functional networks underpinning the relationship
(2018-09-20)Feed efficiency (FE) is defined as a measure of efficiency in converting metabolizable energy acquired from macronutrients into body mass. The overall aims of this thesis were to identify genomic regions associated with ... -
Host acceptability, suitability, interaction and establishment of two introduced Liriomyza leafminer endoparasitoids: Halticoptera arduine (Walker) (Hymenoptera: Pteromalidae) and Chrysocharis flacilla (Walker) (Hymenoptera: Eulophidae) in Kenya
(2018-08-28)<em>Liriomyza</em> (Diptera: Agromyzidae) leafminers are pests of economic importance to the production of horticultural crops in East Africa. In the scope of a classical biological control program in East Africa, two ... -
The Ethiopian Agricultural Extension System and Its Role as a Development Actor: Cases from Southwestern Ethiopia
(2018-08-15)Smallholder agriculture forms the backbone of the Ethiopian economy, supporting the majority of the country's population. Since the late 1960s, the state has been actively pursuing agricultural extension as a key means of ... -
The role of local agroforestry practices for enhancing food and nutrition security of smallholding farming households: The case of Yayu area, south-western Ethiopia
(2018-08-15)When agriculture becomes focused on globally traded commodities, local nutrition may be at risk. The study tested this hypothesis in the coffee landscape of Yayu, south-west Ethiopia, by investigating the role of local ... -
Assessing land-use dynamics in a Ghanaian cocoa landscape
(2018-07-11)Ghana is one of the two West African nations that produce 60% of the World's annual 4 million tonnes cocoa. The Ghanaian cocoa industry is valued at US$ 2 billion and offers direct jobs to 800,000 farming families. Despite ... -
Phenotyping of Cercospora beticola resistance of sugar beet genotypes by hyperspectral imaging
(2018-06-28)Cultivation of disease resistant crops is an important strategy in the integrated pest management which is a guiding principle for good agricultural practice. Therefore, high yielding cultivars with resistance to important ... -
Sustainability of organic and non-organic smallholder farms in Kenya
(2018-06-29)Smallholder farms play a vital role in the quest for sustainable development, especially in sub- Saharan Africa (SSA) where livelihoods are still heavily reliant on agriculture. Current environmental and socioeconomic ... -
Action-based and outcome-based payments for environmental services: An experimental auction for tree planting contracts in Kenya
(2018-06-25)The dissertation represents a first randomized field experiment that compares action-based and outcome-based payments for environmental services (PES). The main aim of the study was to investigate the effect of the ... -
Conceptualising and estimating rationalised agricultural optimisation models
(2018-07-19)Computational modelling for quantitative agricultural policy assessment in the EU employs more farm level oriented approaches in recent years. This follows policy instruments that increasingly target the farm level and ... -
The effect of air exposure before and after ensiling on maize silage quality and dietary choice by goats
(2018-07-11)The overall aim of the thesis was to determine the effect of air exposure before and after ensiling on quality of whole-crop maize silage and to determine the influence of the resulting changes on dietary choice by goats. ... -
Zur tierökologischen Bedeutung der Elsbeere (Sorbus torminalis L. CRANTZ)
(2018-06-14)Mit der vorliegenden Dissertation soll das ökologische Beziehungsgeflecht der Elsbeere (<em>Sorbus torminalis</em>) erfasst werden, einer in Deutschland seltenen, in zerstreuten, kleinen Populationen vorkommenden Baumart ... -
Ready for regrowth: A physiological and metabolic characterization of young sugar beets under temporary drought
(2018-06-18)Although the sugar beet belongs to the rather drought relevant species, water availability plays a crucial role in terms of plant development and yield formation, hence water deficits can lead to adverse consequences. Aim ... -
Agroforestry as a post-mining land-use approach for waste deposits in alluvial gold mining areas of Colombia
(2018-05-30)Alluvial gold mining generates a vast amount of extractive waste that completely covers the natural soil, destroys riparian ecosystems, and negatively impacts river beds and valleys. Since 2002, a gold mining company has ... -
Consumer acceptance of biotechnology: the influence of product end-use, policy context, and information framing
(2018-06-07)Consumer acceptance of novel technologies is a prerequisite for market adoption of the derived products. The transition towards a more sustainable bioeconomy in Europe requires product and process innovation that promotes ...
