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Question No. 46Interactive Test Mode
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Q46. “System of rice Intensification” of cultivation, in which alternate wetting and drying of rice fields is practised, results in: 1. Reduced seed requirement 2. Reduced methane production 3. Reduced electricity consumption Select the correct answer using the code given below

“System of rice Intensification” of cultivation, in which alternate wetting and drying of rice fields is practised, results in:

  1. Reduced seed requirement
  2. Reduced methane production
  3. Reduced electricity consumption Select the correct answer using the code given below
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2022 • Environment and Ecology

Correct Answer: Option (D) — 1, 2 and 3

Concept & Option Breakdown

Standard Reference Verified

System of Rice Intensification (SRI):

  1. Reduced seed requirement: Seeds are planted individually at wider spacing with young seedlings, reducing seed requirements by up to 80-90%.
  2. Reduced methane production: Alternate Wetting and Drying (AWD) prevents continuous submergence, maintaining aerobic conditions that suppress anaerobic methanogenic bacteria, thereby reducing methane emissions.
  3. 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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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2022 (Q46)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Natural Resources
Official Answer KeyOption (D) — 1, 2 and 3

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Frequently Asked Questions — UPSC Prelims 2022 Q46

What is the official answer for UPSC Prelims 2022 GS Paper I Question 46 (Environment and Ecology)?

The official UPSC answer key for this 2022 Environment and Ecology (Natural Resources) question is Option (D): "1, 2 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2022 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Natural Resources". You can explore all repeated questions from Natural Resources in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Natural Resources UPSC Prelims question using option elimination?

To solve Natural Resources questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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