| Salinity Class | Mapping Symbol | ECe (dS/m) at 25˚C | Salt (%) | Effect on | |
| Soil | Crop | ||||
| Non saline | S1 | Less than 4 | Less than 0.2 | Salts not visible | Growth uneffected |
| Slightly saline | S2 | 4 - 8 | 0.2 - 0.5 | Salts slightly visible | Growth uneven or patchy |
| Moderately saline | S3 | 8 - 15 | 0.5 - 1.0 | Salts fairly visible | Growth stunted and very patchy |
| Strongly saline | S4 | >15 | More than 1.0 | Salts wide-spread | Growth nil or very poor of wild salt tolerant plants may or may not be observed |