Management of inorganic resources for maintenance of soil productivity
2003
Okalebo, J.R.(Kenya Agricultural Research Institute, Nairobi (Kenya). National Agricultural Research Laboratories)
Most cropland soils in East Africa and the tropics are in general highly weathered, leached and deficient in plant nutrients particularly nitrogen and phosphorus. Over the past 80 years or so, efforts have been made within the region to seek ways and means of building the levels of these two nutrients in soils with an overall goal of increasing and sustaining crop productivity. In general, positive crop responses to inorganic fertilizers or resources have been obtained. This paper sunnnarises findings related to some aspects of the management of inorganic resources. These include, the use of specific resources, rates, timing and methods of applicaticn, towards improved productivity. It is suggested that economic analysis of crop yield and other data are important considerations for future research. Unfavourable economic environment contributes to lack or slow adoption of farming technologies in the developing world
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