Prospects for integrated soil fertility management using organic and inorganic inputs: evidence from smallholder African agricultural systems |
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| Institution: | 1. World Agroforestry Centre, P.O. Box 30677, Nairobi, Kenya;2. Department of Applied Economics and Management, Cornell University, 315 Warren Hall, Ithaca, NY 14853-7801, USA;3. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), P.O. Box 39063, Nairobi, Kenya;4. Tropical Soil Biology and Fertility Institute (TSBF), International Center for Tropical Agriculture (CIAT), P.O Box 30677, Nairobi, Kenya;1. International Maize and Wheat Improvement Center (CIMMYT), P.O. Box 1041-00621, Nairobi, Kenya;2. Centre for Development Research (ZEF), University of Bonn, Bonn, Germany;3. International Maize and Wheat Improvement Center (CIMMYT), Carretera México-Veracruz Km. 45 El Batán, Texcoco, C.P. 56237, Mexico;1. Soil Science and Agricultural Engineering Department, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe;2. Crop Science Department, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe;3. Plant, Soil and Microbial Sciences Department, Michigan State University, East Lansing, MI 48824, USA;4. International Plant Nutrition Institute, 102-411 Downey Road, Saskatoon, Saskatchewan, Canada;5. International Plant Nutrition Institute, ICIPE Compound, Box 30772, Nairobi, Kenya;1. Ohio State University, USA;2. Cornell University, USA;1. International Maize and Wheat Improvement Center (CIMMYT), Nairobi, Kenya;2. International Maize and Wheat Improvement Center (CIMMYT), Addis Ababa, Ethiopia;1. International Crops Research Institute for the Semi-arid Tropics (ICRISAT), P.O. Box 5689, Addis Ababa, Ethiopia;2. International Center for Tropical Agriculture (CIAT), P.O. Box 5689, Addis Ababa, Ethiopia;3. International Crops Research Institute for the Semi-arid Tropics (ICRISAT), Arusha, Tanzania |
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| Abstract: | This paper reviews current organic nutrient management practices and their integration with mineral fertilizers in Sub-Saharan Africa with a view to understanding the potential impacts on a range of input markets. A number of different organic nutrient management practices have been found to be technically and financially beneficial, but they differ considerably as to their effectiveness and resource requirements. A review of African smallholder experiences with integrated soil fertility management practices finds growing use, both indigenously and through participation in agricultural projects. Patterns of use vary considerably across heterogeneous agroecological conditions, communities and households, but are stimulated by profitable commercially oriented agricultural opportunities. The potential for integrated soil fertility management to expand markets for organic inputs, labor, credit, and fertilizer is explored. We found that there are few direct analyses of these links and indirect evidence at this point in time is inconclusive. |
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