Suche
Anzeige der Dokumente 31-40 von 138
Dissertation
Untersuchung und Darstellung der Qualitätsveränderung von Agrarprodukten während der Trocknung
(2018)
Das Ziel der Arbeit war es optimale Trocknungsprozesse für verschiedene Agrarprodukte zu finden. Dazu wurden die Qualitätskriterien frischer und getrockneter Agrarprodukte analysiert und die Veränderungen durch die unterschiedlichen Trocknungsparameter, wie Luftgeschwindigkeit, Taupunkttemperatur, Trocknungstemperatur und –zeit dargestellt. In einer Literaturrecherche wurden sowohl die Faktoren für die Nachernteverluste und deren Höhe in Industrie- sowie Schwellen- und Entwicklungsländer untersucht. Zudem sind die ...
Dissertation
Technical and Environmental Assessment of Energy and Material Production from Rural and Urban Residual Biomass
(2020-04)
Die vorliegende Arbeit umfasst Studien zur Untersuchung technischer und ökologischer Aspekte bei der Nutzung von Restbiomassen in den Nutzungspfaden Energieerzeugung und Aktivkohleproduktion. Im Mittelpunkt der jeweiligen Untersuchung stand das Verfahren zur integrierten Erzeugung von Festbrennstoff und Biogas aus Biomasse (IFBB) und dessen Einfluss auf technische und ökologische Aspekte bei der Verwertung von Restbiomassen. Im Zuge von Naturschutz- und Landschaftspflegemaßnahmen auf extensiv bewirtschafteten ...
Dissertation
Evaluation of Pathological Risks Associated with Use of Leguminous Cover crop and Living mulch species
(2017-11-15)
In the past 10 to 15 years, there has been a tendency in Europe to switch from cereal based cropping systems, with winter and summer fallow, to cropping systems which combine greater crop diversity with maximum soil cover. Increasing the opportunities of including legumes into crop rotations to be grown as cover crops, intercropped or under-sown with cereals can provide multiple beneficial services to agro-ecosystems. A major concern is however, that many of the leguminous species of interest share important soil-borne ...
Dissertation
Resistance Based Integrated Pest Management Strategy for Globodera rostochiensis and Globodera pallida in Potato Cropping Systems
(2019-10)
Potato cyst nematodes (PCN), Globodera rostochiensis and G. pallida are important potato pests responsible for high yield losses globally. The ability of PCN to persist in the soil for a long time makes their management challenging and therefore these nematodes are under strict quarantine regulations in many countries. Nevertheless, both PCN species have recently been reported in potato cropping systems in Kenya. Resistant potato cultivars reduce nematode densities in the field below damage threshold levels and thus ...
Aufsatz
Construction and Use of a Simple Index of Urbanisation in the Rural–Urban Interface of Bangalore, India
(2017-11-21)
Urbanisation is a global trend rapidly transforming the biophysical and socioeconomic structures of metropolitan areas. To better understand (and perhaps control) these processes, more interdisciplinary research must be dedicated to the rural–urban interface. This also calls for a common reference system describing intermediate stages along a rural–urban gradient. The present paper constructs a simple index of urbanisation for villages in the Greater Bangalore Area, using GIS analysis of satellite images, and combining ...
Aufsatz
Effect of Sowing Method and Weed Control on the Performance of Maize (Zea mays L.) Intercropped with Climbing Beans (Phaseolus vulgaris L.)
(2017-06-23)
Maize is grown on a large area in Germany and there is a growing concern in society about negative environmental effects related to this. The objective of the study was to test the performance of mixtures of maize and climbing beans as an alternative to monocropped maize under different site and management conditions. The effects of sowing density of maize and beans as well as the sowing time of beans on total dry matter (DM) yield and bean DM contribution to the total yield were investigated. Further, various ...
Aufsatz
Nutritional Comparison of White and Red Coccinia Abyssinica (Lam.) Cong. Accessions: An Under-Utilised Edible Tuber of the Ethiopian Highlands
(2017-08-22)
Anchote (Coccinia abyssinica) is an indigenous tuber crop of the Ethiopian Highlands. It is popular in the western Oromia Region of the country. Apart from food, the crop is also used in traditional medicine. Anchote tubers possess two variations in its tissue colour, red and white. In this study, a small market survey and a nutritional comparison of red and white anchote were conducted. White tissue anchote seems to be more popular, due to its soft texture and ease of cooking. However, the red variant was considered ...
Dissertation
Process optimisation and development of non-invasive monitoring approaches for the drying of apples
(2020)
Drying is of great importance particularly in the field of preserving agricultural products. It plays a very critical role by delivering nutrient rich products with a long shelf-life as well as help to combat food loss. Drying processing techniques have changed and improved significantly over time, helping to ensure food abundance in both aesthetical and nutritional regards. Convective hot air drying is one of the most common technique practiced by 85 % of industries. It can be easily applied in the remote areas of ...
Aufsatz
Morphological and Genetic Diversity of Sea Buckthorn (Hippophae rhamnoides L.) in the Karakoram Mountains of Northern Pakistan
(2018-07-30)
Sea buckthorn (Hippophae rhamnoides L.) is a dioecious, wind-pollinated shrub growing in Eurasia including the Karakoram Mountains of Pakistan (Gilgit-Baltistan territory). Contrary to the situation in other countries, in Pakistan this species is heavily underutilized. Moreover, a striking diversity of berry colors and shapes in Pakistan raises the question: which varieties might be more suitable for different national and international markets? Therefore, both morphological and genetic diversity of sea buckthorn ...
Aufsatz
Estimation of Vegetable Crop Parameter by Multi-temporal UAV-Borne Images
(2018-05-22)
3D point cloud analysis of imagery collected by unmanned aerial vehicles (UAV) has been shown to be a valuable tool for estimation of crop phenotypic traits, such as plant height, in several species. Spatial information about these phenotypic traits can be used to derive information about other important crop characteristics, like fresh biomass yield, which could not be derived directly from the point clouds. Previous approaches have often only considered single date measurements using a single point cloud derived ...