Question

Arrange these soil types in ascending order in respect of depth of irrigation water per irrigation. A. Loam, B. Clay loam, C. Sandy, D. Sandy loam, E. Heavy clay.

• A. C \(<\) D \(<\) A \(<\) B \(<\) E
• B. B \(<\) C \(<\) A \(<\) D \(<\) E
• C. D \(<\) C \(<\) A \(<\) B \(<\) E
• D. C \(<\) D \(<\) B \(<\) A \(<\) E

Hint:

Sandy soil needs smaller irrigation depth but more frequent irrigation; clayey soil needs larger depth but less frequent irrigation.

Answer 1

The Correct Option is A

Concept:
Depth of irrigation water depends on the water holding capacity of soil. Sandy soils require less depth per irrigation, while clayey soils require more.

Step 1: Lowest irrigation depth.
Sandy soil has low water holding capacity, so less water is applied per irrigation. \[ \text{Lowest}=C \]

Step 2: Intermediate soils.
Sandy loam requires more than sandy soil. Loam requires more than sandy loam. Clay loam requires still more. \[ D<A<B \]

Step 3: Highest irrigation depth.
Heavy clay has high water holding capacity, so it needs the highest depth per irrigation. \[ \text{Highest}=E \]

Step 4: Final ascending order. \[ C<D<A<B<E \] \[ \therefore \text{Correct Answer is (A)} \]