By F. Makken (auth.), A. Uzo Mokwunye (eds.)
Tropical Africa escaped from the glaciers that coated the temperate components of the area through the Ice Age. The legacy is that the majority of the father or mother fabrics of the soils of tropical Africa are outdated, hugely weathered and with out bases and phosphate-bearing minerals. conventional farming structures which have been particularly solid and sustainable trusted lengthy fallow classes after one to 2 years of cropping to keep up the effective ability of the soils. lately and particularly in densely populated parts, a big type of 'landless' farmers have all 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 turn into a big problem to agricultural scientists in tropical Africa. to extend the nutrient offering strength of soils calls for the inputs of fertilizers. those may be natural or inorganic. The potency with which those externally provided inputs can bring up agricultural construction and decrease soil and environmental deterioration depends at the skill of scientists to figure out the best kinds and amounts of the goods to use to every soil, crop and cropping procedure in addition to the facility of farmers to obtain 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
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International Food Policy Research Institute, Washington DC, USA 15. Jenkinson DS and Ayanaba A (1977) Decomposition of carbon-14 labeled plant material nnder tropical conditions Soil Sci Soc Am J 41 (5): 912-915 16. Jones MJ (1973) Time of Application of Nitrogen Fertilizer to Maize at Samarn, Nigeria. Experimental Agriculture 9: 113-120 17. Kang BT, Wilson GF and Lawson TL (1984) Alley Cropping: A stable alternative to shifting cultivation. IITA, Ibadan, Nigeria 18. Keay RWJ (1958) Vegetation map of Africa south of the Tropic of Cancer.
The resulting shallowness of rooting depth affects moisture availability and fertilizer use efficiency. §.. §.. GO i= 40 w c. w C. 40 J! §.. w c. 60 . l! i 40 ~ 20 0 8 '6 Decade 24 32 Fig. 6. Climatic water balance at three locations in West Africa. Sadore and Dosso are in the Southern Sahelian zone and Bengou in the Sudanian zone. Alfisols which dominate the drier climatic zones (Southern Sahel, Sudanian, Northern Guinea Savanna) are also marked by high structural instability, low inherent fertility, low CEC and low organic matter content .
Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa by F. Makken (auth.), A. Uzo Mokwunye (eds.)