Previous Year Question
“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:
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
Correct Answer: D
Detailed Solution
Statement 1 is correct: SRI involves transplanting young, single seedlings at wider spacing. Consequently, fewer seeds are required for nursery raising and transplantation.
Statement 2 is correct: The field is not kept continuously flooded. Intermittent drying allows oxygen to enter the soil and suppresses anaerobic microbial activity responsible for methane production.
Statement 3 is correct: Alternate wetting and drying reduces the requirement for irrigation water. Where electric pumps are used, fewer pumping hours also reduce electricity consumption.