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This paper uses data from a 1998 survey of farming households in Nakuru district, Kenya to explore factors influencing soil fertility management decisions of smallholder farmers in Africa. The modeling strategy builds on results of research in soil science that point to the joint determination of...


Omamo, S.W.Williams, J.C.Obare, G.A.Ndiwa, Nicholas N.[Soil fertility management on small farms in Africa: Evidence from Nakuru district, Kenya]Soil fertility management on small farms in Africa: Evidence from Nakuru district, Kenya

Phosphorus (P) is required to improve soil fertility for food and feed produciton in sub-Saharan Africa, but the high cost of conventional, water-soluble P fertilizers limits their use by resource-poor farmers. Rockphosphates are a low-cost alternative. The effectiveness, in terms of seed product...


Haque, I.Lupwayi, N.Z.Ssali, H.[Agronomic evaluation of unacidulated and partially acidulated Chilembwe rockphosphates for clover seed production]Agronomic evaluation of unacidulated and partially acidulated Chilembwe rockphosphates for clover seed production

The role of livestock in nitrogen cycling in mixed crop-livestock farming systems of sub-Saharan Africa was explored. Cattle were fed a range of diets to investigate the effects on partitioning of nitrogen between urine and faeces and on the chemical composition of the manures produced. The trade...


Delve, Robert J.Cadisch, GeorgTanner, J.C.Thorpe, W.R.Thorne, Peter J.Giller, Ken E.[Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa]Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa

Thiss paper presents an overview of the current status, problems and prospects for achieving a better nutrient balance to support varying levels of productivity from the three major livestock systems in Africa. In free range grazing systems, livestock nutrient deficiencies are mainly overcome by ...


Mohamed-Saleem, M.A.[Nutrient balance patterns in African livestock systems]Nutrient balance patterns in African livestock systems

Alfisols, Vertisols, Inceptisols, Aridisols, Mollisols, and Entisols were sampled (0-30 cm) from 32 locations across Ethiopia. The soils were analyzed for copper (Cu), zinc (Zn), manganese (Mn), and iron (Fe) contents using 0.005 M diethylene triamine pentaacetic acid (DTPA), 0.05 M hydrochloric ...


Haque, I.Lupwayi, N.Z.Tadesse, T.[Soil micronutrient contents and relation to other soil properties in Ethiopia]Soil micronutrient contents and relation to other soil properties in Ethiopia

In order to contribute to improved utilisation of herbaceous legumes, in particular Centrosema macrocarpum and Stylosanthes guianensis for crop-livestock systems, the present study explored a number of management options to improve the effect of legumes on subsequent maize yield. The objectives o...


Muhr, I.Tarawali, Shirley A.Peters, MichaelSchultze-Kraft, Rainer[Soil mineral N dynamics and maize grain yields following Centrosema macrocarpum and Stylosanthes guianensis: Effects of different rotations and varying levels of N fertiliser]Soil mineral N dynamics and maize grain yields following Centrosema macrocarpum and Stylosanthes guianensis: Effects of different rotations and varying levels of N fertiliser
Katungi, EnidLetaa, EmmanuelKabungo, CatherineNdunguru, Agness[Access and utilization of improved common bean technologies in Southern Tanzania]Access and utilization of improved common bean technologies in Southern Tanzania

El Centro Internacional de Agricultura Tropical (CIAT) está celebrando 50 años de trabajo colaborativo con cientos de socios en los trópicos. Durante 50 años, el CIAT ha liderado el desarrollo y difusión de tecnologías, métodos innovadores y nuevos conocimientos que contribuyen para que los produ...


International Center for Tropical Agriculture[Los impactos de la investigación colaborativa del CIAT]Los impactos de la investigación colaborativa del CIAT
Sommer, RolfBraslow, Juliet[African eco-efficient solutions to food insecurity and climate change]African eco-efficient solutions to food insecurity and climate change

Root rot severely constrains bean (Phaseolus vulgaris L.) production in parts of Western Kenya. Genetic and soil management options were evaluated for an integrated root rot management approach. Four hundred genotypes were progressively screened in the field for resistance to root not over six se...


Otsyina, R.M.Ajanga, SIBuruchara, Robin A.Wortmann, Charles S.[Development of an integrated bean root rot control strategy for Western Kenya]Development of an integrated bean root rot control strategy for Western Kenya

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