Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — 1, 2 and 3
Concept & Option Breakdown
Standard Reference VerifiedSystem of Rice Intensification (SRI):
- Reduced seed requirement: Seeds are planted individually at wider spacing with young seedlings, reducing seed requirements by up to 80-90%.
- Reduced methane production: Alternate Wetting and Drying (AWD) prevents continuous submergence, maintaining aerobic conditions that suppress anaerobic methanogenic bacteria, thereby reducing methane emissions.
- Reduced electricity consumption: Because water requirements drop significantly (by 25-50%), the pumping hours for tube-wells/pumps are reduced, saving substantial electrical energy.
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