A comparative method for the collection of labor utilization data for secondary crops : the example of cocoyam and soybean farming systems surveys in west Africa

KNIPSCHEER, H. C.

A comparative method for the collection of labor utilization data for secondary crops : the example of cocoyam and soybean farming systems surveys in west Africa - Ibadan International Institute of Tropical Agriculture 1981 - 12p.


agriculture


West Africa


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