1. Anderson, J.M., Ingram, J.S.I., 1993. Tropical Soil Biology and Fertility: A Handbook of Methods, second ed. CAB International, Wallingford, UK.
2. Utilization of pasture and fodder shrubs in the nutrition of sheep and goats in the humid tropics of West Africa;Atta-Krah;FAO Anim. Prod. Health Pap.,1989
3. Adapting tropical pasture research to the production systems: from Australian ranching to African pastoralism;Bayer;Exp. Agric.,1989
4. Nigerian livestock resources survey;Bourn;World Anim. Rev.,1994
5. Screening legume green manures as nitrogen sources to succeeding non-legume crops. I. The fallow soil method;Bowen;Plant Soil,1988