Role of Local Agro-minerals in Mineral Fertilizer Recommandations for Crops: Examples of Some West Africa Phosphate Rocks

One of the major constraints to enhanced crop productivity in West Africa is low soil fertility and particularly soil deficiency in available phosphorus (P). When P is limiting, crop production is greatly compromised even though the other nutrients are available in large amounts. The use of soluble P fertilizers is hampered by the cost of the P fertilizers commercially available, too high for resource-poor farmers. Therefore, exploitation of the locally available phosphate rock (PR) deposits represents an alternative for soil P supply to ensure mineral plant nutrition. The effectiveness of a particular PR depends mainly on its chemical and mineralogical composition, and to some extent on environmental conditions, crop type and management practices. This communication highlights some results of the research works that have been carried out in the region to enhance the direct use of PR in agriculture and how theses PR can be integrated in fertilizer recommendations for crops. Direct application of phosphate rocks may be an economical alternative to the use of the more expensive imported water-soluble P fertilizers for certain crops and soils.
Crops, Rock phosphate, Soil fertility
Lompo, F., A. Bationo, M.P. Sedogo, V.B. Bado, V. Hien, and B. Ouattara. 2018. “Role of Local Agro-minerals in Mineral Fertilizer Recommendations for Crops: Examples of Some West Africa Phosphate Rocks,” IN Improving the Profitability, Sustainability and Efficiency of Nutrients Through Site Specific Fertilizer Recommendations in West Africa Agro-Ecosystems, Volume 1, A. Bationo, D. Ngaradoum, S. Youl, F. Lompo, and J.O. Fening (Eds.)