@PROCEEDINGS {FAJEMISIN:1984, title = {Basic constraints to maize productivity in tropical Africa}, author = {Fajemisin, J. }, booktitle = {Presented at the U.S. Universities-CIMMYT Maize Conference on Collaboration Toward Mutual Maize Production Objectives in Less Developed Countries, 4-14 August}, year = {1984}, publisher = {CIMMYT}, address = {El Batan, Mexico}, }