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| Common Bean Yield in Low Phosphorus Content of Soils of Kakamega County, Export of phosphorus in crop produce, Soil erosion by oxides in acidic soils, Fixation by oxides in acidic soils. (1) |
| Common Bean Yield in Low Phosphorus Content of Soils of Kakamega County, Export of phosphorus in crop produce, Soil erosion by oxides in acidic soils, Fixation by oxides in acidic soils. (1) |