If the cultivation method is faulty and less efficient, resulting in the wastage of water, the duty of the water will naturally be
- AlessCorrect
- Bmore
- Caverage
- Ddepending upon cultivators
Solution
Concept
Duty is the area irrigated per unit discharge. If water is wasted, less area is irrigated by the same water, so duty falls.
Formula
Δ = 8.64 B / D (Δ in m, B in days, D in ha/cumec)
Step-by-step solution
1. Duty (D) = area irrigated (hectares) by 1 cumec of water flowing for the full base period. 2. A faulty, less efficient cultivation method wastes water. 3. More water is used per hectare, so the same 1 cumec irrigates a smaller area. 4. A smaller area per cumec means the duty is less.
Explanation
Duty tells how much land one cumec of water can irrigate. When the cultivation method is poor and water is wasted, the same water covers less land. So the duty becomes less.
Why the other options are wrong
B: More duty needs less wastage, not more. C: 'Average' is not a fixed value; wastage clearly lowers duty. D: The effect is definite (duty decreases); it does not depend on the cultivator's choice.
Shortcut
Water wasted means duty decreases. Efficient use means duty increases.
Common mistake
Confusing duty with delta. Wastage increases delta (depth used) but decreases duty.
Correct answer: A) less