@INPROCEEDINGS {EKELEME:2007, title = {Effect of weed competition on upland rice production in north-eastern Nigeria}, author = {Ekeleme, F. and Kamara, A. and Oikeh, S. and Chikoye, D. and Omoigui, L. }, booktitle = {African Crop Science Conference Proceedings}, year = {2007}, volume = {8}, pages = {61--65}, publisher = {African Crop Science Society}, }