A
1 and 2 only
B
2 and 3 only
C
1 and 3 only
D
1, 2 and 3
Correct answer: (d) 1, 2 and 3
Explanation
- A
1 and 2 only
1 and 2 only. Alternate wetting also cuts pump-hours / electricity.
- B
2 and 3 only
2 and 3 only. Seed rate in SRI is also lower.
- C
1 and 3 only
1 and 3 only. Methane falls when fields are not continuously flooded.
- D
1, 2 and 3
All three. SRI: fewer seedlings, AWD (less CH4), less irrigation energy.
Summary. Official key is (d) all three. System of Rice Intensification uses fewer plants (lower seed), alternate wetting and drying (less methane than continuous flood), and therefore less pumping / electricity.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2017 · Q71 · General Studies · 2 marks
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: