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Table 4 Rating for nutrient availability

From: Land evaluation for crop production in Upper Kabete Campus field, University of Nairobi, Kenya

Rating Soil reaction (pH) CEC
1 5.6–7.3 ≥ 24
2 5.1–5.5 16–24
3 4.5–5.0 10–15
4 < 4.5 < 10