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Bationo, A and Lompo, F and Koala, S (1998) Research on nutrient flows and balances in west Africa: state-of-the-art. Agriculture, Ecosystems and Environment, 71 (1-3). pp. 19-35. ISSN 0167-8809
Snapp, S S and Mafongoya, P L and Waddington, S (1998) Organic matter technologies for integrated nutrient management in smallholder cropping systems of southern Africa. Agriculture, Ecosystems and Environment, 71 (1-3). pp. 185-200. ISSN 0167-8809