Model |
| Soil quality grades | ||||
Approach | VL (Q5) | L (Q4) | M (Q3) | H (Q2) | VH (Q1) | |
AQI | TDS | <0.48 | 0.48 - 0.55 | 0.55 - 0.62 | 0.62 - 0.69 | >0.69 |
MDS | <0.30 | 0.30 - 0.40 | 0.40 - 0.50 | 0.50 - 0.60 | >0.60 | |
WQI | TDS | <0.46 | 0.46 - 0.53 | 0.53 - 0.60 | 0.60 - 0.67 | >0.67 |
MDS | <0.33 | 0.33 - 0.46 | 0.46 - 0.59 | 0.59 - 0.72 | >0.72 | |
NQI | TDS | <0.32 | 0.32 - 0.37 | 0.37 - 0.42 | 0.42 - 0.47 | >0.47 |
MDS | <0.17 | 0.17 - 0.23 | 0.23 - 0.29 | 0.29 - 0.35 | >0.35 |