@INPROCEEDINGS {NIELSEN:2003, title = {Reducing speargrass (Imperata cylindrica) with conservation agriculture involving farmers in research to reduce labor and herbicide use and to conserve yields}, author = {Nielsen, O. and Manyong, V. and Ellis-Jones, J. and Streibig, J. and Chikoye, D. }, booktitle = {Paper presented at: 6th Biennial Conference of the African Crop Science Society; 12-17 October}, year = {2003}, location = {Nairobi, Kenya}, }