Summary
The chemical properties of 128 soil samples collected from the surface and subsurface layers of 64 NPK treated coffee (Coffea canephora P.) plots were analysed. The ensuing data were compared with those from other coffee, cocoa and tropical soils of West Africa and Brazil. After seven years of NPK application to the coffee soil in Southwestern Nigeria, the soil was considered deficient in base elements especially Ca and Mg, N, P and K were considered fairly marginal. NPK treatments were found to effect statistically significant differences in the nutrient contents of coffee plots.
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Ojeniyi, S.O. Nutrient status of NPK-treated coffee plots. Plant Soil 56, 175–179 (1980). https://doi.org/10.1007/BF02197967
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DOI: https://doi.org/10.1007/BF02197967