Table 2.
Relationship between gibbsite equilibrium constant (Kgibb) and soil organic matter content.
| Soil organic matter (%) | <1.5 | 1.5–3.5 | 3.5–5.0 | 5.0–15 | 15–30 | >30 |
| Kgibb (m6/eq2) | 9500 | 3000 | 950 | 300 | 100 | 9.5 |
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