@INBOOK {ASADU:1989, title = {Relative changes in the nutrient composition of six cultivars of white yam grown in three ecozones of southeastern Nigeria}, author = {Asadu, C. * and Ezumah, H. C. and Akammigbo, F. O. and Nweke, F. }, year = {1989}, type = {Cassava-based cropping systems research II}, pages = {126--137}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Yam}, }