Allied & ICAR Exam Bank • ALLIED_0578 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Agricultural Drainage and Salinity

Subtopic: Agricultural Drainage and Salinity

Question Statement:

A sodic soil has high ESP requiring gypsum amendment. If Cation Exchange Capacity is $CEC = 20\text{ meq}/100\text{g}$ and current $ESP = 30\%$, the milliequivalents of exchangeable sodium per $100\text{ g}$ of soil is $20 \times 0.30$ meq/100g, which equals:

Answer Key:

6

Step-by-Step Solution & Explanation

Exchangeable Na $= 20 \times 0.30 = 6.0\text{ meq}/100\text{g}$.
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