@INBOOK {TARAWALI:2001, title = {The role of livestock in the maintenance and improvement of soil fertility}, author = {Tarawali, S. and Larbi, A. and Fernandez-Rivera, S. and Bationo, A. *}, year = {2001}, type = {Sustaining soil fertility in West Africa. Vol 58.}, pages = {281--304}, publisher = {Madison, WI, USA: Soil Science Society of America (SSSA); America Society of Agronomy}, }