The article examines the suitability of different agricultural research strategies in African countries with varying endowments of land, labour, and climate. Differences in such endowments lead to a wide spectrum of farming systems. Agricultural technologies that are cost-effective in some farming systems are not in others. Many past failures are due to a mismatch between technological strategies and farming systems. The article classifies countries of Sub-Saharan Africa on the basis of agroclimatic density and suggests appropriate technological strategies for each class of countries.
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Prabhu Pingali (1988) studied this question.