"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:

QUESTION

Easy

Environment & Ecology

Prelims 2022

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

Reduced seed requirement
Reduced methane production
Reduced electricity consumption

Select the correct answer using the code given below:

Select an option to attempt

Explanation

Statement 1 is Correct: SRI requires significantly fewer seeds (about 5-8 kg/ha) compared to traditional transplanting methods (60-80 kg/ha) because it involves planting single, younger seedlings with wider spacing. Statement 2 is Correct: The practice of Alternate Wetting and Drying (AWD) prevents continuous submergence of fields, reducing anaerobic conditions and thereby significantly lowering methane emissions produced by methanogenic bacteria. Statement 3 is Correct: SRI reduces water requirement by 30-50% due to controlled irrigation; this directly leads to lower electricity or fuel consumption needed for pumping groundwater.

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