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Les activities culturales dans le systeme agropastoral peul du Nigeria central by Powell, J.M., Taylor-Powell, E.

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Contribution des residus de recoltes au disponible fourrager de saison seche dans la plaine d'Abet (Nigeria central) by Powell, J.M.

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

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Faecal excretion by ruminants and manure availability for crop production in semi-arid West Africa by Fernández Rivera, S., Williams, Timothy O., Hiernaux, Pierre H.Y., Powell, J.M.

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Feed factors affecting nutrient excretion by ruminants and the fate of nutrients when applied to soil by Somda, Z.C., Powell, J.M., Fernández Rivera, S., Reed, J.D.

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Manure utilisation, drought cycles and herd dynamics in the Sahel: implications for cropland productivity by Williams, Timothy O., Powell, J.M., Fernández Rivera, S.

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Nutrient cycling in integrated rangeland/cropland systems of the Sahel by Powell, J.M., Fernández Rivera, S., Hiernaux, Pierre H.Y., Turner, M.D.

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Nitrogen and phosphorus transfers in a crop-livestock system in West Africa by Powell, J.M., Mohamed-Saleem, M.A.

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Effects of sheep diet on nutrient cycling in mixed farming systems of semi-arid West Africa by Powell, J.M., Fernández Rivera, S., Hofs, S.

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Fertilizer nitrogen and stover removal effects on sorghum yields and nutrient uptake and partitioning by Powell, J.M., Hons, F.M.

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Plant yields and fodder quality related characteristics of millet-stylo intercropping systems in the Sahel by Kouamé, C.N., Powell, J.M., Renard, C.A., Quesenberry, K.H.

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Manure for cropping: Case study from central Nigeria by Powell, J.M.

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Assessment of dry-matter yield from grain yield in the West African savannah zone by Powell, J.M.

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Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy? by Williams, Timothy O., Powell, J.M., Fernández Rivera, S.

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Manure availability in relation to sustainable food crop production in semi-arid West Africa: Evidence from Niger by Williams, Timothy O., Powell, J.M., Fernández Rivera, S.

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Yields of sorghum and millet and stover consumption by livestock in the subhumid zone of Nigeria by Powell, J.M.

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

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Crop-livestock interactions in the West African drylands by Powell, J.M., Pearson, R.A., Hiernaux, Pierre H.Y.

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Soil PH and nitrogen changes following cattle and sheep urine deposition by Somda, Z.C., Powell, J.M., Bationo, B. André

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

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