| Statistical parametera | Soil bulk density (g∙cm−3) | Volumetric moisture content (%) |
| Md * | 0.0638 | 6.190 |
| RMSE | 0.0573 | 2.814 |
| a | 0.831 | 20.830 |
| b | 0.456 | 0.403 |
| R2 | 0.474 | 0.201 |