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Journal Article 1996

Autor: Powell, J.M. Fernández Rivera, S. Hiernaux, Pierre H.Y. Turner, M.D.

In the Sahel of West Africa, the productivities of rangelands, croplands and livestock are inextricably linked. Cattle, sheep and goats graze rangelands and crop residues, and their manure/urine is used to fertilize crops. Rangelands provide important feeds during the manuring period, resulting i...

Enlace original: https://cgspace.cgiar.org/handle/10568/28104

Investigación en Agricultura
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Powell, J.M. ,  Fernández Rivera, S. ,  Hiernaux, Pierre H.Y. ,  Turner, M.D. ,  [Nutrient cycling in integrated rangeland/cropland systems of the Sahel] ,  Nutrient cycling in integrated rangeland/cropland systems of the Sahel
Journal Article 1995

Autor: Williams, Timothy O. Powell, J.M. Fernández Rivera, S.

Animal manure is of vital importance in maintaining soil fertility in semiarid west Africa due to the low level of use of inorganic fertilizer. Using data from Niger however, it is shown that insufficient animals are available to provide the manure needed to sustain crop yields on a long-term bas...

Enlace original: https://cgspace.cgiar.org/handle/10568/29323

Investigación en Agricultura
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Williams, Timothy O. ,  Powell, J.M. ,  Fernández Rivera, S. ,  [Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy?] ,  Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy?
Journal Article 1995

Autor: Williams, Timothy O. Powell, J.M. Fernández Rivera, S.

Despite its vital role in supporting crop production, a key question that has often been posed is whether sufficient amounts of manure are available to permit adequate food production and improvement of soil quality on a long-term basis. While this question can be addressed at a regional, nationa...

Enlace original: https://cgspace.cgiar.org/handle/10568/29547

Investigación en Agricultura
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Williams, Timothy O. ,  Powell, J.M. ,  Fernández Rivera, S. ,  [Manure availability in relation to sustainable food crop production in semi-arid West Africa: Evidence from Niger] ,  Manure availability in relation to sustainable food crop production in semi-arid West Africa: Evidence from Niger
Conference Paper 2002

Autor: Tarawali, Shirley A. Singh, B.B. Gupta, S.C. Tabo, Ramadjita Harris, F. Nokoe, S. Fernández Rivera, S. Bationo, B. André Manyong, Victor M. Makinde, K. Odion, E.C.

Agriculture in the dry savannas is intensifying in response to increasing populations of humans and livestock. As a result, increased productivity demands are placed upon integrated crop-livestock systems and more emphasis is on the roles of legumes such as cowpea. Cowpea has the potential to fun...

Enlace original: https://cgspace.cgiar.org/handle/10568/49692

Investigación en Agricultura
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Tarawali, Shirley A. ,  Singh, B.B. ,  Gupta, S.C. ,  Tabo, Ramadjita ,  Harris, F. ,  Nokoe, S. ,  Fernández Rivera, S. ,  Bationo, B. André ,  Manyong, Victor M. ,  Makinde, K. ,  Odion, E.C. ,  [Cowpea as a key factor for a new approach to integrated crop-livestock systems research in the dry savannas of West Africa] ,  Cowpea as a key factor for a new approach to integrated crop-livestock systems research in the dry savannas of West Africa
Journal Article 1994

Autor: Powell, J.M. Fernández Rivera, S. Hofs, S.

The cycling of biomass through livestock into manure and urine that fertilise the soil is important linkage between livestock and soil productivity in semi-arid West Africa. This study was conducted to determine the effects of different forage leaves on the amounts and forms of nutrients excreted...

Enlace original: https://cgspace.cgiar.org/handle/10568/28123

Investigación en Agricultura
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Powell, J.M. ,  Fernández Rivera, S. ,  Hofs, S. ,  [Effects of sheep diet on nutrient cycling in mixed farming systems of semi-arid West Africa] ,  Effects of sheep diet on nutrient cycling in mixed farming systems of semi-arid West Africa
Conference Paper 1996

Autor: Powell, J.M. Fernández Rivera, S. Hiernaux, Pierre H.Y. Turner, M.

The sustainability of nutrient transfers in integrated rangeland/cropland systems of the Sahel was examined in relation to the impact of livestock. Rangeland nutrient balances are considered in equilibrium whereas croplands lack the internal capacity to replenish nutrient off takes in grain and c...

Enlace original: https://cgspace.cgiar.org/handle/10568/50882

Investigación en Agricultura
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Powell, J.M. ,  Fernández Rivera, S. ,  Hiernaux, Pierre H.Y. ,  Turner, M. ,  [Nutrient cycling in integrated rangeland/cropland systems of the Sahel] ,  Nutrient cycling in integrated rangeland/cropland systems of the Sahel
Conference Proceedings 1994

Autor: Powell, J.M. Fernández Rivera, S. Williams, Timothy O. Renard, C.

This document summarises the major discussions, findings and recommendations of the conference convened by ILCA and its cosponsors to bring together national and international experts in livestock nutrition and management, ecology, agronomy, soil science and socio-economics to address fundamental...

Enlace original: https://cgspace.cgiar.org/handle/10568/2721

Investigación en Agricultura
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Powell, J.M. ,  Fernández Rivera, S. ,  Williams, Timothy O. ,  Renard, C. ,  [Livestock and sustainable nutrient cycling in mixed farming systems of sub-Saharan Africa. Volume I: Conference summary] ,  Livestock and sustainable nutrient cycling in mixed farming systems of sub-Saharan Africa. Volume I: Conference summary
Conference Paper 1997

Autor: Williams, Timothy O. Hiernaux, Pierre H.Y. Fernández Rivera, S. Turner, M.

Mixed farming systems, combining crop and livestock activities, hold considerable promise for improved agricultural productivity and environmental conservation in semi-arid West Africa. Increasing population pressure and climatic changes have combined to render long-fallow periods less feasible a...

Enlace original: https://cgspace.cgiar.org/handle/10568/50805

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Williams, Timothy O. ,  Hiernaux, Pierre H.Y. ,  Fernández Rivera, S. ,  Turner, M. ,  [Livestock production and sustainable agricultural Development in semi-arid West Africa] ,  Livestock production and sustainable agricultural Development in semi-arid West Africa
Conference Paper 1995

Autor: Fernández Rivera, S. Hiernaux, Pierre H.Y. Kaufmann, Ralph R. von Turner, M. Williams, Timothy O.

Three papers are reviewed in this paper. The first paper presents a model of biological processes to investigate long-term effects of soil and crop long-erm effects of soil and crop management strategies while the other two papers present approaches to study crop production strategies at the ente...

Enlace original: https://cgspace.cgiar.org/handle/10568/51038

Investigación en Agricultura
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Fernández Rivera, S. ,  Hiernaux, Pierre H.Y. ,  Kaufmann, Ralph R. von ,  Turner, M. ,  Williams, Timothy O. ,  [Response to case studies of eco-regional approaches at the farm/enterprise level] ,  Response to case studies of eco-regional approaches at the farm/enterprise level

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