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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
Conference Proceedings 1995

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

Achieving sustainable increases in agricultural production in sub-Saharan Africa is both a regional and a worldwide concern. High human and animal population densities in some areas have surpassed land-carrying capacities causing environmental degradation and undermining the long-term stability o...

Enlace original: https://cgspace.cgiar.org/handle/10568/401

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 II: Technical papers. Proceedings of an international conference] ,  Livestock and sustainable nutrient cycling in mixed farming systems of sub-Saharan Africa. Volume II: Technical papers. Proceedings of an international conference
Conference Paper 1992

Autor: Kouame, C. Hoefs, S. Powell, J.M. Roxas, D. Renard, C.

The increasing interest in crop-livestock integration in sub-Saharan Africa has emphasised the beneficial uses of forage legumes in cereal-based cropping systems. Forage legume-cereal cropping systems were evaluated in 1989 and 1990 at the ICRISAT (International Crops Research Institute for the S...

Enlace original: https://cgspace.cgiar.org/handle/10568/49957

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Kouame, C. ,  Hoefs, S. ,  Powell, J.M. ,  Roxas, D. ,  Renard, C. ,  [Intercrop Stylosanthes effects on millet yields and animal performance in the Sahel] ,  Intercrop Stylosanthes effects on millet yields and animal performance in the Sahel
Journal Article 1998

Autor: Brouwer, J. Powell, J.M.

In African agriculture, availability of nutrients for crop production can be increased using external inputs such as mineral fertiliser. However, for many African farmers the large scale use of external inputs will remain beyond reach for the foreseeable future. There is, therefore, also a need f...

Enlace original: https://cgspace.cgiar.org/handle/10568/30022

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Brouwer, J. ,  Powell, J.M. ,  [Increasing nutrient use efficiency in West-African agriculture: The impact of micro-topography on nutrient leaching from cattle and sheep manure] ,  Increasing nutrient use efficiency in West-African agriculture: The impact of micro-topography on nutrient leaching from cattle and sheep manure
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

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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

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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
Journal Article 1998

Autor: Powell, J.M. Ikpe, F.N. Somda, Z.C. Fernández Rivera, S.

Most farming systems in semi-arid West Africa rely on organic matter recycling for maintaining soil fertility. The cycling of biomass through ruminant livestock into dung (faeces) and urine that fertilize the soil has long been an important factor in the nutrient cycling processes of these integr...

Enlace original: https://cgspace.cgiar.org/handle/10568/32910

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Powell, J.M. ,  Ikpe, F.N. ,  Somda, Z.C. ,  Fernández Rivera, S. ,  [Urine effects on soil chemical properties and the impact of urine and dung on pearl millet yield] ,  Urine effects on soil chemical properties and the impact of urine and dung on pearl millet yield
Journal Article 1997

Autor: Somda, Z.C. Powell, J.M. Bationo, B. André

The changes in soil pH and mineral N concentrations of cattle and sheep urine patches were compared to those occurring in fertilizer urea placement zones in a study in Niger. Urine and fertilizer solutions each containing 400 mg N (800 kg N/ha) were spread onto individual plots covering a surface...

Enlace original: https://cgspace.cgiar.org/handle/10568/32871

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Somda, Z.C. ,  Powell, J.M. ,  Bationo, B. André ,  [Soil PH and nitrogen changes following cattle and sheep urine deposition] ,  Soil PH and nitrogen changes following cattle and sheep urine deposition
Conference Paper 1995

Autor: Haque, I. Powell, J.M. Ehui, Simeon K.

This paper is comprised of five parts. The first part discusses the role of legumes in sustainable soil management and crop-livestock production. In this part, strategic use of legumes, selection of forage legumes to sub-optimal soil conditions, use of appropriate rhizobium, response of legumes t...

Enlace original: https://cgspace.cgiar.org/handle/10568/49913

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Haque, I. ,  Powell, J.M. ,  Ehui, Simeon K. ,  [Improved crop-livestock production strategies for sustainable soil management in tropical Africa] ,  Improved crop-livestock production strategies for sustainable soil management in tropical 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

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