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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
Cooper, P J M and Dimes, J and Rao, K P C and Shapiro, B and Shiferaw, B and Twomlow, S J and Verchot, L P and Cooper, P (2008) Coping better with current climatic variability in the rain-fed farming systems of sub-Saharan Africa: An essential first step in adapting to future climate change? Agriculture, Ecosystems & Environment, 126 (1/2). pp. 24-35.
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
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.
Winslow, M and Shapiro, B and Sanders, J (2007) Policies, institutions and market development to accelerate technological change in the semiarid zones of Sub-Saharan Africa. In: Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges and Opportunities. Springer, Netherlands, pp. 933-940. ISBN 978-1-4020-5759-5