"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:
Correct Answer: Option D
Explanation
1. Statement 1: The System of Rice Intensification (SRI) involves transplanting very young, single seedlings at wider spacing compared to traditional methods. This significantly reduces the quantity of seed needed per unit area. Thus, reduced seed requirement is a key feature of SRI. This statement is correct.
2. Statement 2: SRI promotes alternate wetting and drying (AWD) of rice fields, avoiding continuous flooding. The periodic drying allows oxygen to enter the soil, creating aerobic conditions that suppress the activity of anaerobic methanogenic bacteria responsible for methane emissions in flooded paddies. This leads to reduced methane production. This statement is correct.
3. Statement 3: By avoiding continuous flooding and using AWD, SRI reduces the total amount of irrigation water required. This, in turn, decreases the energy needed for pumping water, leading to reduced electricity consumption, especially where electric pumps are used for irrigation. This statement is correct.
4. Since all three statements are correct, the correct option is (D).
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