@INPROCEEDINGS {BIRANG:2002, title = {Farmers' perception of earthworms' effects on soil fertility and crop performance}, author = {Birang, A. and Hauser, S. and Amougou, D. }, booktitle = {Proceedings}, year = {2002}, location = {Cardiff, Wales}, note = {Paper presented at: The 7th International Symposium on Earthworm Ecology, 1-6 September}, }