Question

Arrange these irrigation methods with increasing water use efficiency. A. Sprinkler method, B. Flood method, C. Drip method, D. Basin method.

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

Hint:

Drip irrigation has the highest water use efficiency among common irrigation methods.

Answer 1

The Correct Option is C

Concept:
Water use efficiency depends on how effectively irrigation water is applied and used by the crop.

Step 1: Flood method.
Flood irrigation usually has the lowest water use efficiency because losses are high. \[ \text{Lowest}=B \]

Step 2: Basin method.
Basin method is better than flood method but still has more losses than sprinkler and drip. \[ \text{Next}=D \]

Step 3: Sprinkler method.
Sprinkler method has better water use efficiency than surface irrigation methods. \[ \text{Next}=A \]

Step 4: Drip method.
Drip irrigation applies water directly near the root zone, so it has the highest water use efficiency. \[ \text{Highest}=C \] Thus: \[ B<D<A<C \] \[ \therefore \text{Correct Answer is (C)} \]