Titlebook: Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa; A. Uzo Mokwunye Book 1991 Springer Science+Business Me

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Vincent S. L. Cheung,Howard C. Luongion with the International Fertilizer Development Center (IFDC). Results show that crop needs for N, P, and S depend on the plant characteristics, climatic and edaphic factors. In Saria, at the northern tip of the Sudan zone, application of 30 kgN/ha, 13.2 kg P/ha and 25 kg K/ha produced the highest

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Design and Power Considerations,agricultural production in the Gambia. A lot of the early work on soil fertility and fertilizers was on cash crops. Recent studies by the Ministry of Agriculture and by such agencies as the FAO have emphasized on-farm research on food crops. Collaborative research with the International Fertilizer D

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B. Milner,V. Rapoport,L. Yevenkols in Liberia are highly leached and acidic Ultisols. Nitrogen and phosphorus, in that order, are the two most limiting nutrients in these soils which are dominated by 1.1 lattice clays. Many of the earliest trials showed that crops responded positively to the use of fertilizers. However, little or

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B. Milner,V. Rapoport,L. Yevenkothese nutrients are needed in the soils. While confirming the widespread deficiencies of N and P, the trials also showed that only moderate amounts of N and P are required to overcome these deficiencies and satisfy crop needs. Nitrogen fertilizers applied at rates of 80 kg/ha should be split applied

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