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Incentives for Fertilizer Use in Sub-Saharan Africa: A Review of Empirical Evidence on Fertilizer Response and Profitability
Yanggen, David, (1998)
Fertilizer in Sub-Saharan Africa: Breaking the Vicious Circle of High Prices and Low Demand
Kelly, Valerie A., (1998)
Improving the Measurement and Analysis of African Agricultural Productivity: Promoting Complementarities between Micro and Macro Data
Kelly, Valerie A., (1995)