| No. | Available (P) ppm | (P) Soil Categories | Available (K) ppm | K Soil Categories |
| 1 | <20 | Low | 0 - 60 | Low |
| 2 | 20 - 40 | Medium | 61 - 120 | Medium |
| 3 | 40 - 100 | High | 121 - 180 | High |
| 4 | >100 | Very High (Excessive) | >180 | Very High (Excessive) |