ABSTRACT
The purpose of the model is to allow economic analysis of relations between inputs and outputs from the bottom up, and of factor productivities. The product annual output of crops poses no particular problem other than measurement. Conceptually, it is the same as the classical production of agriculture the world over, in other words, the output of annual crops produced by combining land, labor, and capital. Labor is a variable input in African low-resource agriculture, as it is in agriculture elsewhere. Rural households, which supply the great preponderance of labor used in agricultural production, contain a labor reserve of family members that can be mobilized in case conditions appear to the farmer highly favorable for crop and livestock production. The relationships and principles discussed with respect to crop combinations, livestock practices, and similar resource and product problems then serve as sufficient principles in outlining efficiency within this framework.
