By F. Makken (auth.), A. Uzo Mokwunye (eds.)
Tropical Africa escaped from the glaciers that coated the temperate components of the realm throughout the Ice Age. The legacy is that the majority of the guardian fabrics of the soils of tropical Africa are previous, hugely weathered and with out bases and phosphate-bearing minerals. conventional farming platforms which have been fairly sturdy and sustainable trusted lengthy fallow classes after one to 2 years of cropping to keep up the effective skill of the soils. lately and particularly in densely populated parts, a titanic type of 'landless' farmers have started to domesticate marginal lands or to invade the 'forest reserves' thereby exacerbating the issues of land and environ psychological degradation. of soil fertility that would facilitate the creation of sufficient amounts of the primary holding a degree staples has develop into an enormous problem to agricultural scientists in tropical Africa. to extend the nutrient delivering energy of soils calls for the inputs of fertilizers. those will be natural or inorganic. The potency with which those externally provided inputs can bring up agricultural creation and decrease soil and environmental deterioration relies at the skill of scientists to figure out the appropriate kinds and amounts of the goods to use to every soil, crop and cropping procedure in addition to the power of farmers to procure considered necessary farm deal with ment skills.
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Extra resources for Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa
291-303 28. World Bank (1987) West Africa Agricultural Research Review Washington D,C. A. U. ). Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa, 33-44. © 1991 Kluwer Academic Publishers. L. K. Sivakumar 2 1 Agroclimatologist, International Institute of Tropical Agriculture, Ibadan, Nigeria 2 Principal Agroclimatologist, ICRISAT Sahelian Center, Niamey, Niger Key words: Sub-Saharan Africa, climate, rainfall, erodibility, mulch Abstract The alarming food deficits projected for sub-Saharan African from recent production figures make it mandatory that no effort be spared in reversing the trend of declining yields.
4. IFDC's strategies in information services, networking, technology transfer, training, and publications aim to strengthen fertilizer information flow and technology transfer at international and national levels in the region. The ultimate beneficiaries of these interventions, however, will hopefully be the farmers of the region who can benefit from more and better information on how to use fertilizers judiciously to obtain much needed increases in yields and output of food crops over the coming years and decades.
An analysis by Sivakumar  based on data from 64 stations in the Southern Sahelian and Sudanian climatic zones showed that during the crop growing season, maximum air temperatures vary from 28-42°C, Mean maximum tempera- 37 tures at the time of sowing (May-June) can exceed 40°C. For the transitional zone (Derived Savanna), Lawson (27) also reported maximum air temperatures outside the 20-30°C range believed conducive for maximum photosynthesis in crops such as cowpea . High soil temperatures also contribute to the adverse effect of air temperature on productivity in West Africa.