E-Dissertationen: E-Dissertationen: Neuzugänge
Anzeige der Dokumente 341-360 von 1116
-
Partitioning Water Vapor Fluxes by the Use of Their Water Stable Isotopologues: From the Lab to the Field
(2019-09-04)Water stable isotopes are powerful tracers for partitioning of the terrestrial ecosystem water vapor fluxes into process-based components, i.e. evapotranspiration (<em>ET</em>) into soil evaporation (<em>E</em>) and plant ... -
Untersuchungen zur Wirkung metallischer Nanopartikel auf Pflanzen
(2019-08-27)Die zunehmende Verwendung von Nanopartikeln (Np) in Konsumgütern und industriellen Anwendungen löst im Hinblick auf deren mögliche Freisetzung in der Umwelt und die damit verbundenen Auswirkungen auf Ökosysteme und Organismen ... -
Nitrogen sequestration in paddy and non-paddy soils formed from different parent materials
(2019-08-19)Paddy soils exhibit low nitrogen (N) use efficiency. Prior research in this field suggested that paddy soils may sequester significant amounts of N in aged amino acids, microbial residues, or even in pyrogenic N. The ... -
Demand for organic food in Switzerland
(2019-08-20)The aim of this dissertation is to better understand the functioning of the organic food market in Switzerland. Over the last three decades the market for organic food in Switzerland has developed positively and continues ... -
Spatial competition of learning agents in agricultural procurement markets
(2019-07-15)Spatially dispersed farmers supply raw milk as the primary input to a small number of large dairy-processing firms. The spatial competition of processing firms has short- to long-term repercussions on farm and processor ... -
Challenges and opportunities of using ecological and remote sensing variables for crop pest and disease mapping
(2019-07-15)Crop pest and diseases are responsible for major economic losses in the agricultural systems in Africa resulting in food insecurity. Potential yield losses for major crops across Africa are mainly caused by pests and ... -
Modeling the impact of biopores in the soil on root growth and root water uptake
(2019-06-19)<strong>Background and Motivation:</strong> Biopores are tubular shaped cavities in the soil formed by biological activity that enable plant roots to reach water and nutrient reservoirs at greater depths. Especially during ... -
Visual Odometry and Sparse Scene Reconstruction for UAVs with a Multi-Fisheye Camera System
(2019-06-13)Autonomously operating UAVs demand a fast localization for navigation, to actively explore unknown areas and to create maps. For pose estimation, many UAV systems make use of a combination of GPS receivers and inertial ... -
Boundary work and agricultural innovation systems: Stakeholder interaction and learning using an example of push-pull technology in Ethiopia
(2019-06-17)Maize is an important cereal crop for food security in Ethiopia. However, its productivity is low with average grain yields of less than 1 ton/ha which is below its potential of over 4 ton/ha. This is attributed to a variety ... -
Rice yield gaps in West Africa
(2019-05-15)Rice is a staple food for many countries in Africa but the production has never satisfied the demand which largely depends on imports. Therefore, more efforts are needed for raising yield in order to reduce the gap between ... -
Studies on nematode factors activating the plant immune system
(2019-05-15)Plant-parasitic nematodes are destructive pests causing crop losses accounting for billions of dollars annually. To defend against invading pathogens plants rely on innate immune system which involves the recognition of ... -
Impact of ensiling conditions on formation of biogenic amines in grass and legume silages and feed intake behaviour of goats
(2019-05-14)Silage produced from small-grained legumes can contribute to the protein supply of ruminants. However, the susceptibility to protein degradation during harvest and the entire conservation process impedes to achieve high ... -
African nightshade and African spinach: A neglected and underutilized resource with significant potential to manage plant-parasitic nematodes
(2019-05-07)African indigenous vegetables (AIV) are essential for dietary diversification and ensuring nutritional requirements for people in sub-Sahara Africa. AIV have been largely marginalized by agriculture research, yet they are ... -
Direct use of urine as fertilizer: potential risks of loading pharmaceuticals and hormones to field crops
(2019-04-11)Ecological sanitation or Ecosan is an alternative approach to avoid the disadvantages of conventional water-based sanitation systems. This approach, based on ecosystem functioning and the closure of material flow cycles, ... -
Suitability of non-destructive sensors for monitoring physiological and biochemical responses of tomato leaves and fruits to abiotic stresses
(2019-05-02)The major aim of the present work was to proof the suitability of chlorophyll fluorescence-based indices to non-destructively monitor and predict changes in the content of plant compounds in response to abiotic stresses. ... -
A water storage reanalysis over the European continent: assimilation of GRACE data into a high-resolution hydrological model and validation
(2019-04-18)<p>Continental water storage and redistribution within the Earth’s system are key variables of the terrestrial water cycle. Changes in water storage and fluxes may affect resources for drinking water and irrigation, lead ... -
Bio-ecology of the African citrus triozid Trioza erytreae Del Guercio (Hemiptera: Triozidae) on citrus in Kenya: implication for its management
(2019-03-12)Citrus production is a major industry in Kenya. Apart from providing income and jobs, it contributes to food and nutritional security. For the last decade, citrus production has experienced a continuous decline, particularly ... -
Drivers of change, adaptation and resilience of agricultural systems facing increased salinity intrusion in deltaic coastal areas of Vietnam
(2019-02-19)This PhD research aimed to examine historical and present drivers of agricultural changes in the Mekong (MKD) and Red River (RRD) deltas in Vietnam since 1975 as well as explore adaptation pathways and resilience of ... -
Evaluation of 13C Mixed Triglyceride Breath Testing and Fecal Elastase 1 assays for the assessment of pancreatic function in babies with cystic fibrosis: Including an assessment of healthy babies to establish the range of normal for the 13C Breath test
(2019-02-19)Evaluation of <sup>13</sup>C Mixed Triglyceride Breath Testing and Fecal Elastase 1 assays for the assessment of pancreatic function in babies with cystic fibrosis (Including an assessment of healthy babies to establish ... -
Performance evaluation of reservoir-based irrigation schemes in the Upper East region of Ghana
(2019-02-19)The design of relevant adaptation strategies for water users in irrigation schemes in drylands of Sub-Saharan Africa requires up-to-date information about the current performance of these schemes in view of rapid changes ...
