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This document first describes the main agroecological zone found in sub-Saharan Africa and the environmental constraints to agricultural production inherent in these zones. This is followed by a description of the main agricultural production systems and land use practices. Factors that have cont...


Ehui, Simeon K.Williams, Timothy O.Swallow, B.M.[Economic factors and policies encouraging environmentally detrimental land use practices in sub-Saharan Africa]Economic factors and policies encouraging environmentally detrimental land use practices in sub-Saharan Africa
Ehui, Simeon K.Paulos, Z.Solomon, A.Benin, S.E.Gebremedhin, BerhanuJabbar, M.A.Pender, J.L.[Interregional comparisons of agricultural production efficiency in the Ethiopian highland]Interregional comparisons of agricultural production efficiency in the Ethiopian highland

The diversity of agro-ecological zones in Ethiopia and variations in region-specific policies leads to an assumption that agriculture is fairly diverse regionally. The regional differentiation due to agro-ecology, policies and programmes leads one to expect variations in factor returns, allocatio...


Ehui, Simeon K.Paulos, Z.Solomon, S.Benin, S.E.Gebremedhin, BerhanuJabbar, M.A.Pender, J.L.[Interregional comparisons of agricultural production efficiency in the Ethiopian highlands]Interregional comparisons of agricultural production efficiency in the Ethiopian highlands

In this paper, a broader perspective on the causes of environmental degradation is taken and issues for policy analysis are examined. Causes of natural resource degradation, property arrangements, capital markets, commodity prices, monetary policy, and marketing are discussed. Highlights issues f...


Ehui, Simeon K.[Environmental degradation in sub-Saharan Africa: issues for policy analysis]Environmental degradation in sub-Saharan Africa: issues for policy analysis

Economic constraints and opportunities for improving small ruminant production systems in sub-Saharan Africa must be understood as the basis for developing interventions. However, most national agricultural research systems (NARS) face a shortage of livestock economists, and biological scientists...


Ehui, Simeon K.Rey, B.[Partial budget analysis for on-station and on-farm small ruminant production systems research: Method and data requirements]Partial budget analysis for on-station and on-farm small ruminant production systems research: Method and data requirements

This paper addresses issues related to the roles and actions that the different partners in livestock research and Development can take to increase co-operation, ensure more effective technology transfer and increase impact. The focus is on Africa, because this region, while not being unique in f...


Ehui, Simeon K.Shapiro, Barry I.[Improving livestock research and technology transfer in developing countries]Improving livestock research and technology transfer in developing countries

This paper assesses factors that influence livestock holding, livestock population mix and dynamics and how they relate to land use, management and land degradation. It discusses factors that influence different economic functions of livestock, especially income, saving and expenditure and the im...


Jabbar, M.A.Ahmed, M.Benin, S.E.Gebremedhin, BerhanuEhui, Simeon K.[Livestock, livelihood and land management issues in the highlands of Ethiopia]Livestock, livelihood and land management issues in the highlands of Ethiopia
Preckel, P.V.Ahmed, M.M.Ehui, Simeon K.[Modeling economic motivation for diversification on subsistence farms in the Ethiopian highlands]Modeling economic motivation for diversification on subsistence farms in the Ethiopian highlands

Increasing dairy production to meet the growing demand for milk in developing countries presents several technical and environmental challenges. Supplying the feed resources required and improving the efficiency of their conversion into a highly nutritive food and valued market commodity is one o...


Fernández Rivera, S.Vuuren, A.M. vanOkike, I.Ehui, Simeon K.Tegegne, Azage[Milk production and feed requirements in dairy systems of developing countries by 2010]Milk production and feed requirements in dairy systems of developing countries by 2010

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