@INBOOK {EZUMAH:1988a, title = {Response of a cassava-maize intercrop to nitrogen in two-year sequential cropping}, author = {Ezumah, H. C. and Nweke, F. and Kalabare, N. D. and Karunwi, A. }, year = {1988}, type = {Cassava-based cropping systems research 1}, pages = {161--175}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Cassava}, }