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Results of research work carried out in Africa on the response of beans to NPK fertilizers, liming, S and other secondary/micronutrients, and organic manures are reviewed. Band or spot placement of P, fertilizer management in multiple crop systems, and correlations between soil data, yields, and ...
Selected examples of specific agricultural research are discussed to highlight the development of sustainable agricultural production systems. A clear differentiation between plant protectants and fertilizers is provided. The focus is on Latin American tropics and sub-tropics and on three staples...
Over the last 12 years a data base of climate, soils and crop distribution has been assembled for Latin America. Recently, socio-economic variables such as access and populations density and environmental variables such as the location of national parks, biological reserves and indian reserves ha...
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