Allied & ICAR Exam Bank • ALLIED_1245 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Crop Water Requirement

Subtopic: Irrigation Interval

Question Statement:

A crop has readily available root zone moisture of $RAW = 48\text{ mm}$. If the daily peak crop evapotranspiration is $ET_c = 6.0\text{ mm/day}$ and no effective rainfall occurs, the irrigation interval in days is:

Answer Key:

8

Step-by-Step Solution & Explanation

Irrigation interval $= \frac{RAW}{ET_c} = \frac{48\text{ mm}}{6.0\text{ mm/day}} = 8\text{ days}$.
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