For a SAR value of 27, the irrigation water is classified as

➡️ Sodium Absorption Ratio (SAR):
Sodium concentration in water is measured using the Sodium Absorption Ratio (SAR).
➖ All concentrations are expressed in milli-equivalents (meq/L) or as epm (equivalent per million).

📝 SAR Classification of Water:
🟢 0 – 10 (S1): Low sodium water
🟠 10 – 18 (S2): Medium sodium water
🔴 18 – 26 (S3): High sodium water
⚫ > 26 (S4): Very high sodium water