Question

The sodium absorption rate (SAR) of water considered suitable for irrigation is?

A 12 Correct Answer Incorrect Answer
B <10 Correct Answer Incorrect Answer
C 12-18 Correct Answer Incorrect Answer
D <18 Correct Answer Incorrect Answer

Solution

SAR < 10  considered suitable for irrigation. Sodium-ion in small amounts is good for plants. But excess sodium ion creates the problem for both plant and soil. Excess sodium contributes to salinity and it is toxic for some sensitive crops.

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