@INBOOK {NWEKE:1988c, title = {Performance of improved IITA cassava, Manihot esculenta Crantz, at farm level}, author = {Nweke, F. and Ezumah, H. C. and Spencer, D. }, year = {1988}, type = {Cassava-based cropping systems reserach 1}, pages = {83--88}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Cassava}, }