Allied & ICAR Exam Bank • ALLIED_1212 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Soil-Water-Plant Relationship

Subtopic: Management Allowed Depletion

Question Statement:

A crop root zone contains 120 mm of total available water (AWC). If the management allowed depletion (MAD) for the crop is 45%, the depth of net irrigation water (in mm) that should be applied when irrigation is triggered is:

Answer Key:

54

Step-by-Step Solution & Explanation

$RAW = MAD \times AWC = 0.45 \times 120\text{ mm} = 54.0\text{ mm}$.
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