Prelims 2017 · Agriculture · Question 21
Which of the following statements can help in water conservation in agriculture?
- Reduced or zero tillage of the land
- Applying gypsum before irrigating the field
- Allowing crop residue to remain in the field.
Select the correct answer using the code given below:
Answer
1, 2 and 3
1. Reduced or zero tillage of the land — Conservation tillage reduces soil disturbance, improves infiltration, and lowers evaporation loss. Verdict: Correct.
2. Applying gypsum before irrigating the field — In sodic/alkali soils, gypsum improves soil structure and permeability, helping water infiltrate better and reducing runoff/wastage; this can aid water conservation in agriculture. Verdict: Correct.
3. Allowing crop residue to remain in the field — Crop residue acts as mulch, reducing evaporation and improving soil moisture retention. Verdict: Correct.
Therefore, all three statements can help in water conservation in agriculture.