@INBOOK {TIAN:2001, title = {Pueraria phaseoloides cover cropping for the maintenance and improvement of soil fertility}, author = {Tian, G. and Hauser, S. and Koutika, L. and Ishida, F. and Chianu, J. }, year = {2001}, type = {Sustaining soil fertility in West Africa}, pages = {137--155}, }