@PROCEEDINGS {WILSON:1978, title = {Fallow Crops and Food Cropping Systems in the Tropics}, author = {Wilson, G. F. }, booktitle = {Presented at the Third General Meeting of AAASA, Ibadan, Nigeria, April 9 - 15, 1978}, year = {1978}, month = {April}, organization = {AAASA}, address = {Ibadan}, }