| Factors | Southern China | Province | County | Township | ||||
|---|---|---|---|---|---|---|---|---|
| VIF | Decision | VIF | Decision | VIF | Decision | VIF | Decision | |
| Lithology | 1.097 | Confirmed | 2.497 | Confirmed | 1.292 | Confirmed | 3.545 | Reject |
| Soil type | 1.012 | Confirmed | 1.095 | Confirmed | 1.337 | Confirmed | 3.267 | Confirmed |
| Soil erodibility | 1.427 | Confirmed | 1.819 | Confirmed | 1.326 | Confirmed | 1.718 | Confirmed |
| Soil texture | 1.199 | Confirmed | 1.188 | Confirmed | 1.172 | Confirmed | 3.004 | Confirmed |
| Soil moisture (m3/m3) | 2.206 | Confirmed | 1.268 | Confirmed | 1.180 | Confirmed | 3.862 | Confirmed |
| N (g/kg) | 6.609 | Confirmed | 6.299 | Confirmed | 3.533 | Confirmed | 4.116 | Confirmed |
| P (g/kg) | 13.48 | / | 1.083 | Confirmed | 1.644 | Confirmed | 6.537 | Confirmed |
| K (g/kg) | 13.354 | / | 1.448 | Confirmed | 2.557 | Confirmed | 8.480 | Confirmed |
| SOM (g/kg) | 8.144 | Confirmed | 9.691 | Confirmed | 5.466 | Confirmed | 5.291 | Confirmed |
| Elevation (m) | 4.278 | Confirmed | 6.522 | Confirmed | 8.989 | Confirmed | 7.803 | Confirmed |
| Slope (°) | 5.863 | Confirmed | 6.575 | Confirmed | 4.486 | Confirmed | 5.163 | Reject |
| Aspect | 1.002 | Confirmed | 1.407 | Confirmed | 1.032 | Reject | 1.140 | Reject |
| Relief | 5.733 | Confirmed | 6.566 | Confirmed | 4.623 | Confirmed | 5.239 | Reject |
| TWI | 1.095 | Confirmed | 1.087 | Confirmed | 1.157 | Reject | 1.278 | Reject |
| HI | 1.468 | Confirmed | 1.171 | Confirmed | 1.483 | Confirmed | 1.853 | Confirmed |
| Distance from river (m) | 1.052 | Confirmed | 1.089 | Confirmed | 1.296 | Confirmed | 1.930 | Confirmed |
| Temperature (℃) | 3.938 | Confirmed | 2.833 | Confirmed | 41.837 | / | 208.540 | / |
| Rainfall erosivity (MJ·mm/(ha·h·a)) | 4.297 | Confirmed | 2.854 | Confirmed | 1.818 | Confirmed | 35.281 | / |
| Precipitation (mm) | 3.415 | Confirmed | 1.920 | Confirmed | 25.103 | / | 170.030 | / |
| FVC | 4.062 | Confirmed | 4.858 | Confirmed | 4.177 | Confirmed | 3.224 | Confirmed |
| EVI | 1.427 | Confirmed | 1.761 | Confirmed | 1.266 | Confirmed | 1.663 | Reject |
| NDVI | 3.422 | Confirmed | 4.526 | Confirmed | 3.818 | Confirmed | 3.007 | Confirmed |
| Population density (person/km2) | 1.822 | Confirmed | 2.032 | Confirmed | 1.253 | Confirmed | 1.925 | Confirmed |
| GDP (yuan/km2) | 1.732 | Confirmed | 1.761 | Confirmed | 1.289 | Confirmed | 2.021 | Confirmed |
| LULC | 1.411 | Confirmed | 3.615 | Confirmed | 1.103 | Confirmed | 1.276 | Reject |
| Distance from road (m) | 1.428 | Confirmed | 1.471 | Confirmed | 1.425 | Confirmed | 4.565 | Confirmed |
| Distance from settlement (m) | 1.234 | Confirmed | 1.205 | Confirmed | 1.261 | Confirmed | 1.215 | Reject |
