| Soil types | Vulnerability | Codes |
| Ferrallitic soils moderately desaturated reworked and depleted | Low | 1 |
| Moderately desaturated ferrallitic soils remained weakly indurated and impoverished | Average | 2 |
| Indurated moderately desaturated ferrallitic soils | High | 3 |
| Weakly desaturated ferrallitic soils with induration | Very high | 4 |