By F. Makken (auth.), A. Uzo Mokwunye (eds.)
Tropical Africa escaped from the glaciers that lined the temperate components of the area throughout the Ice Age. The legacy is that the majority of the father or mother fabrics of the soils of tropical Africa are previous, hugely weathered and with out bases and phosphate-bearing minerals. conventional farming structures that have been rather strong and sustainable trusted lengthy fallow classes after one to 2 years of cropping to keep up the efficient capability of the soils. in recent years and particularly in densely populated parts, a great classification of 'landless' farmers have began 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 construction of sufficient amounts of the main holding a degree staples has turn into an incredible 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 elevate agricultural creation and decrease soil and environmental deterioration depends at the skill of scientists to figure out the fitting kinds and amounts of the goods to use to every soil, crop and cropping procedure in addition to the power of farmers to obtain considered necessary farm deal with ment skills.
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Additional info for Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa
On the other hand, when precipitation is delayed 10 days beyond the calculated average date of onset of rains, short duration cultivars that will mature early in the remaining growing season are recommended. In addition, in terms of disaster planning, delayed rains signal the need for timely action since traditional and improved cultivars of median season length are likely to give poor yields. Short-period rainfall probability analysis can also be used in the determination of agroclimatic analogues.
15-19, 1979. IITA, Ibadan 27. Lawson TL (1980) Agroclimatic constraints to dry land rice production in West Africa. Pages 37-45 In: World Meteorological Organization and the International Rice Research Institute. Proceedings of a Symposium in the Agrometeorology of the Rice Crop. IRRI, Manila, Philippines 28. Lawson TL and Alluri K (1980) Maximum water requirement of upland rice variety OS 6 in the Humidl 44 Subhumid zone of West Africa. Pages 181-185 In: World Meteorological Organization and International Rice Research Institute.
The time scale(s) of the analysis among other things therefore have to be consistent with morpho-physiological behaviour of the crops. Useful information not readily seen in totals and means of given climatic variables could be derived from more detailed analysis of the appropriate long term historical data. Long term daily rainfall data for example could be used to compute probability of occurrence of different amounts of rain for different periods. Matching this with the crop water requirements, the cropping potential of the area or period can be assessed and cropping risks determined.
Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa by F. Makken (auth.), A. Uzo Mokwunye (eds.)