EC of water in dS/m (=mS/cm) | |||
Classification | USDA (1954) | FAO (1976) | FAO (1992) |
Non-saline | <0.25 | <0.75 | <0.7 |
Slightly saline |
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| 0.7 - 2.0 |
Moderately saline | 0.25 - 0.75 | 0.75 - 3.0 | 2 - 10 |
Highly saline | 0.75 - 2.25 | >3.0 | 10 - 25 |
Very high saline | 2.25 - 50 |
| 25 - 45 |
Sea water: >45 dS/m |
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