Under which condition is a soil identified as sodic soil?

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Electrical Conductivity (EC) equals 8.5 dS/mSodium Adsorption Ratio (SAR) is greater than 13Both EC is 8.5 and SAR exceeds 13Neither EC nor SAR values indicate sodicityNone of the above

Explanation

Sodic soils are characterized primarily by a high Sodium Adsorption Ratio (SAR) exceeding 13, which leads to poor soil structure and reduced permeability. While Electrical Conductivity (EC) measures salinity, sodicity specifically refers to elevated sodium levels relative to calcium and magnesium, indicated by SAR. Therefore, a SAR value greater than 13 is the key criterion for sodic soil classification.