@ARTICLE {EAGLESHAM:1981, title = {Improving the nitrogen nutrition of maize by intercropping with cowpea}, author = {Eaglesham, A. R. J. and Ayanaba, A. and Rao, V and Eskew, D. L. }, journal = {Soil Biology and Biochemistry}, year = {1981}, volume = {13}, pages = {169--171}, }