Research Article
Effects of Organic and Inorganic Materials on Soil Acidity and Phosphorus Availability in a Soil Incubation Study
Table 1
Initial surface (0–15 cm) soil properties.
| Parameter | Bukura | Kakamega |
| pH (H2O) (1 : 2.5) | 4.80 | 5.10 | Exchangeable acidity (cmolc kg−1) | 0.88 | 0.35 | Exchangeable Al (cmolc kg−1) | 0.63 | 0.13 | Ca | 1.94 | 2.1 | Mg | 1.01 | 1.8 | K | 0.12 | 0.2 | ECEC | 3.95 | 4.85 | Al saturation (%) | 22 | 7.2 | Organic C (%) | 3.2 | 2.7 | Total N (%) | 0.3 | 0.3 | C : N ratio | 10.6 | 9.0 | Total P (%) | 0.04 | 0.03 | Olsen P (mg kg−1) | 5.6 | 2.5 | P sorbed at (0.2 mg kg−1) | 260 | 45 |
| Texture (%) | | | Sand | 52 | 54 | Silt | 18 | 28 | Clay | 30 | 18 | Soil classification (FAO System) | Orthic ferralsol | Ferralic cambisols |
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