Q21.
Which of the following statements can help in water conservation in agriculture? 1. Reduced or zero tillage of the land 2. Applying gypsum before irrigating the field 3. Allowing crop residue to remain in the field Select the correct answer using the code given below:
Answer
D
Explanation
No-till farming increases the amount of water that infiltrates into the soil and increases organic matter retention. Gypsum improves the ability of soil to drain and not become waterlogged thus increasing water-use efficiency of crops. Crop residue helps retain soil moisture. All three practices help in water conservation in agriculture.