| Proposed P transport factors | Category | Proposed loss rating value |
| Soil erosion | t·ha−1·yr−1 | |
| Runoff potential | Very Low | 0.2 |
| Low | 0.4 | |
| Medium | 0.6 | |
| High | 0.8 | |
| Very high | 1.0 | |
| Precipitation factor | Sub-humid region | 0.64 |
| Humid region | 1.00 | |
| Super-humid region | 1.46 |