@PROCEEDINGS {ASHRAF:1984, title = {A case study of on-farm adaptive research at Bida Agricultural Development Project, Nigeria}, author = {Ashraf, M. and Balogun, P. and Jibrin, A. }, booktitle = {Presented at a farming systems symposium, 7-10 October, Kansas State University}, year = {1984}, address = {U.S.A.}, }