Sustainable intensification of crop-livestock system through manure management in eastern and western Africa: lessons learned and emerging research approaches - Bationo, B. André; Nandwa, SM; Kimetu, J.M.; Kinyangi, James; Bado, BV; Lompo, F.; Kimani, S.K.; Kihanda, FM; Koala, Saidou (International Livestock Research Institute, 2004)