@PROCEEDINGS {NANGJU:1977a,
title = {Effects of tillage method on growth and yield of cowpea and soybean},
author = {Nangju, D. },
booktitle = {Proc. International Conference on "Role of Soil Physical Properties in Maintaning Productivity of Tropical Soils},
year = {1977},
publisher = {IITA, Ibadan},
}