E-Dissertationen: Search
Now showing items 391-400 of 1021
Entwicklungsperspektiven rindviehhaltender Betriebe in NRW
(2006)
Die EU-Agrarreform von 2003 sieht eine Entkopplung der Beihilfen an die Landwirtschaft von der Produktion vor. Die nationale Ausgestaltung dieser Reform in Deutschland in Form des Kombinationsmodells entzieht der Rinderhaltung ...
Nachrüstlösungen zur Emissionsminderung dezentral entlüfteter Stallungen zur Schweinemast
(2006)
Zwei alternative, nachrüstbare Verfahren zur Emissionsminderung wurden in quasikontinuierlichen Langzeitmessungen hinsichtlich ihrer Leistungsfähigkeit zur Minderung von Staub und Ammoniak in zwei unterschiedlichen Stallungen ...
Die Wirkung der Mikrogravitation auf das Abwehrsystemvon Schwertträgerfischen (Xiphophorus helleri, Heckel)in einem geschlossenen, aquatischen Ökosystem: immunologische und hämatologische Untersuchungen
(2006)
Background: The effect of space flight conditions on the immune system of humans and rodents was investigated since the beginning of space flight. Until now there were no investigations of the influence of microgravity ...
A General Equilibrium Approach to Modeling Water and Land Use Reforms in Uzbekistan
(2006)
In 2000 and 2001, agricultural producers in Uzbekistan were severely affected by the worst draught of the last two decades. Since the agricultural sector depends mainly on the availability of irrigation water, the draught ...
Limiting factors for the establishment of Cordia dodecandra A.DC. and Bixa orellana L. on semi-arid calcareous soils in Yucatan, Mexico
(2006)
In Northern Yucatan, huge areas of abandoned sisal plantations, now assigned to the communities, require agroforestry management strategies that take into account the high spatial variability of soil, the lack of surface ...
Expression analysis of homeobox gene family in bovine pre- and post-implantative developmental stages
(2006)
Homeobox (hox) genes encode transcription factors which regulate the expression of several target genes encoding essential proteins for cell differentiation and proliferation. Thus, hox-genes have long been recognized as ...
Eignung berührungsloser Messverfahren zur Erkennung des Befalls von Zuckerrüben durch Heterodera schachtii (Schmidt) und Möglichkeiten der teilflächenspezifischen integrierten Bekämpfung
(2006)
Zur Erkennung des Befalls von Zuckerrüben durch H. schachtii und zur Differenzierung zwischen den Befallsdichten wurden Gewächshausversuche mit unterschiedlichen Zucker-rübensorten und verschiedenen H. ...
A bio-economic model of small-scale farmers’ land use decisions and technology choice in the eastern Brazilian Amazon
(2006)
A great deal of more recent agricultural research in the Brazilian Amazon region has been focusing on the ‘hot spots’ of deforestation at the forest margins. Small-scale agriculturalists represent the largest group of the ...
The (Ir)relevance of the Crop Yield Gap Concept to Food Security in Developing Countries: With an Application of Multi Agent Modeling to Farming Systems in Uganda
(2006)
This thesis scrutinizes the relationship between the width of the crop yield gap and farm household food security. Many researchers have argued that an exploitable gap between average crop yields and the genetic yield ...
Modelling the European Sugar Sector: Incentives to Supply Sugar Beets and Analysis of Reform Options
(2006)
The Common Market Organisation for sugar of the European Union has withstood major reform of any kind over the last three decades while other agricultural markets have been subject to far reaching reforms. Today, this ...