@INBOOK {NOKOE:2000a, title = {Biometric issues in agronomy: further on-station and on-farm designs and analyses}, author = {Nokoe, S. }, editor = {Akoroda, M. }, year = {2000}, type = {Agronomy in Nigeria}, pages = {35--42}, publisher = {University of Ibadan. Department of Agronomy}, address = {Ibadan, Nigeria}, }