Agricultural Mechanization and the Evolution of Farming Systems in Sub-Saharan Africa

Book excerpt: The slow pace of agricultural mechanization in Africa has long been a puzzle. This book begins to solve the puzzle by looking at the conditions in sub-Saharan Africa that have led to only sporadic use of the plow rather than the hand hoe, very limited use of tractors and even oxen, and the failure of many projects seeking to move directly from hand hoes to tractors. The authors interviewed farmers at fifty sites in ten countries. They found that the pace of mechanization has been slow in Africa because it often is not cost effective. Among the issues discussed in the book are : (a) the effect on yields of substituting plows for hoes; (b) the cost-effectiveness of using draft animals as opposed to tractors; (c) conditions under which tractors can be used more efficiently than oxen; and (d) the negative consequences of government interventions to encourage the use of tractors beyond what is economically justified.