Affiliation: | 1. Kwame N’Krumah University Science and Technology, Kumasi, Ghana 4. International Fertilizer Development Center, Accra, Ghana 5. International Fertilizer Development Center, Ouagadougou, Burkina Faso 2. Department of Crop and Soil Sciences, KNUST, Kumasi, Ghana 3. International Institute of Tropical Agriculture, Ibadan, Nigeria
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