By F. Makken (auth.), A. Uzo Mokwunye (eds.)
Tropical Africa escaped from the glaciers that coated the temperate elements of the area in the course of the Ice Age. The legacy is that almost all of the mum or dad fabrics of the soils of tropical Africa are outdated, hugely weathered and without bases and phosphate-bearing minerals. conventional farming platforms which have been particularly strong and sustainable trusted lengthy fallow classes after one to 2 years of cropping to take care of the effective capability of the soils. in recent years and particularly in densely populated components, a mammoth classification 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 may facilitate the construction of enough amounts of the main retaining 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 might be natural or inorganic. The potency with which those externally provided inputs can raise agricultural creation and decrease soil and environmental deterioration relies at the skill of scientists to figure out the proper forms and amounts of the goods to use to every soil, crop and cropping method in addition to the facility 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
Sample text
Lawson, UTA, Ibadan Nigeria). The higher amount and frequency of rains with such intensities in these wetter regions accentuate the associated problem of runoff and erosion. Soil loss values ranging from 11 to 33 t/ha/yr on a 5% slope under maize-maize and cassave respectively have been reported [1]. 6 tlha/yr while on bare soils at Sefa, Senegal, a much higher value of 21 tlha/yr under a higher mean rainfall of 1300 mm has been observed [4]. The general consequence of these soil losses is the rapid degradation and losses of productive capacity of the land over time.
IRRI, Manila, Philippines 32. Lawson TL (1988) Agrometeorology - The changing weather / climatic conditions and its implications for Agriculture in the Tropics with Nigeria as a case study. A paper presented at the June Quarterly Luncheon Meeting of the Agricultural Trade Group of the Lagos Chamber of Commerce and Industry. June 29, 1988, Lagos Nigeria 33. Monteith JL (1977) Soil temperature and crop growth in the tropics. Pages 249-262 In: Lal R and Greenland DJ (ed) Soil Physical properties and crop production in the tropics.
4. 5. 6. 7. 8. 9. 10. 11. 12. Aina PO, Lal R and Taylor GS (1977) Soil management in relation to soil erosion in the rainforest of western Nigeria. Pages 75-82 in SCS Soil Erosion: Prediction and Control. Special Publication 211 USA Auberville A (1949) Climats, forest et desertification de I'Afrique tropicale Soc Edit Geog Marit et Col Paris, 351 pp Ayanaba A and Lawson TL (1977) Diurnal changes in acetylene reduction in field-grow cowpea and soybeans. Soil Bioi Biochem 9: 125-129 Charreau C and Nicou R (1971) L'am6iioration du profil cultural dans les sols sableux et sablo argilcux de la zone tropicale seche Ouest Africaine et ses incidences agronomiques.