Allied & ICAR Exam Bank • ALLIED_0580 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Agricultural Drainage and Salinity

Subtopic: Agricultural Drainage and Salinity

Question Statement:

Irrigation water has electrical conductivity $EC_{iw} = 1.5\text{ dS/m}$. Maximum permissible drainage water salinity is $EC_{dw} = 7.5\text{ dS/m}$. The leaching requirement ($LR$) is:

Answer Key:

0.2

Step-by-Step Solution & Explanation

$LR = 1.5 / 7.5 = 0.20$ (or $20\%$).
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