Table 2.
Results of XRF chemical composition of soils.
| Composition (%) | Silt | Sand | Clay |
|---|---|---|---|
| SiO2 | 47.9 | 52.1 | 51.6 |
| Al2O3 | 39.0 | 19.3 | 16.9 |
| Fe2O3 | 10.7 | 10.2 | 13.9 |
| CaO | 0.1 | 8.0 | 0.36 |
| MgO | 0.5 | 5.1 | 12.3 |
| Na2O | 0.1 | 2.6 | - |
| SO3 | 0.1 | - | - |
| TiO2 | 1.6 | 1.3 | 1.17 |
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