1. Fallows, forage and nutrient transfers by livestock in Niger;Achard;Nutr. Cycl. Agroecosyst.,2003
2. Carbon, nitrogen and phosphorus dynamics under continuous cultivation as influenced by farmyard manure and inorganic fertilizers in the savanna of northern Nigeria;Agbenin;Agric. Ecosyst. Environ.,1997
3. Agboola, A.A., Kintomo, A.A., 1995. Nutrient recycling in pastures, rangeland, fallow and cut-and-carry systems in sub-Saharan Africa. In: Powell, J.M., Fernández-Rivera, S., Williams, T.O., Renard, C. (Eds.), Livestock and Sustainable Nutrient Cycling in Mixed Farming Systems of sub-Saharan Africa, vol. II: Technical Papers. ILCA, Addis Ababa, pp. 247–261
4. Decline in soil fertility due to intensification of land use by shifting agriculturists in Belize, Central America;Arnason;Agro-Ecosyst.,1982
5. Research on nutrient flows and balances in West-Africa: state-of-the-art;Bationo;Agric. Ecosyst. Environ.,1998