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Yamoah, C F and Bationo, A and Shapiro, B and Koala, S (2011) Use of rainfall indices to analyze the effects of phosphate rocks on millet in the Sahel. African Journal of Agricultural Research, 6 (3). pp. 586-593. ISSN 1991-637X
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
Yamoah, C F and Bationo, A and Shapiro, B and Koala, S (2002) Trend and stability analyses of millet yields treated with fertilizer and crop residues in the Sahel. Field Crops Research, 75 (1). pp. 53-62.
Fatondji, D and Martius, C and Zougmore, R B and Vlek, P L G and Bielders, C L and Koala, S (2009) Decomposition of organic amendment and nutrient release under the zai technique in the Sahel. Nutrient Cycling in Agroecosystems, 85 (3). pp. 225-239.
Yamoah, C F and Bationo, A and Wyatt, T J and Shapiro, B and Koala, S (2003) Simulated weather variables effects on millet fertilized with phosphate rock in the Sahel. Nutrient Cycling in Agroecosystems, 67 (2). pp. 167-176. ISSN 1385-1314
Yamoah, C F and Bationo, A and Shapiro, B and Koala, S (2003) Soil management practices to improve nutrient-use efficiencies and reduce risk in millet-based cropping systems in the Sahel. Tropicultura, 21 (2). pp. 66-72. ISSN 0771-3312