Q22.
"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:
Answer
D
Explanation
All three statements are correct. SRI was first developed in Madagascar in the 1980s. Option 1 is correct: Under SRI, only 2 kg seed is required per acre vs 5 kg in traditional methods. Option 2 is correct: By alternating wet and dry conditions, SRI minimises methane production. Option 3 is correct: With less water consumption, SRI saves total energy inputs — a study in Vietnam proved SRI methods can save around 23% of energy inputs while increasing energy outputs by 11%.