Question

A soil is having a field capacity of \(42%\) and permanent wilting point of \(19%\). If irrigation has to be done at \(40%\) depletion of available moisture, at what soil moisture percentage the field is to be irrigated?

• A. \(23%\)
• B. \(28.2%\)
• C. \(30.5%\)
• D. \(32.8%\)

Hint:

Important irrigation formula: \[ \boxed{ AM = FC - PWP } \] and \[ \boxed{ \text{Irrigation Moisture} = FC - (\text{Allowable depletion}) } \] For this problem: \[ 42 - (0.4 \times 23) = 32.8% \] Memory Trick: \[ \boxed{ \text{“Subtract allowable depletion from field capacity”} } \]

Answer 1

The Correct Option is D