@ARTICLE {ORKWOR:1994, title = {Response of yam (Dioscorea rotundata Poir.) to various periods of weed interference in an intercropping with maize (Zea mays L.), okra (Abelmoschus esculentus L. Moench), and sweet potato (Ipomoea batatas L. Lam)}, author = {Orkwor, G. C. and Okereke, O. U. and Ezedinma, C. and Hahn, S. K. and Ezumah, H. C. and Akobundu, I. }, journal = {Acta Horticulturae}, year = {1994}, volume = {380}, pages = {349--354}, issn = {0567-7572}, note = {RTB; Root and Tuber; Yam}, }