UPSC Prelims 2022 – Question 22

Here is Question No. 22 a part of our series on UPSC Prelims 2022.

Q22. “System of Rice Intensification” of Cultivation, in which alternate wetting and drying of rice fields is practiced, results in:

1. Reduced seed requirement
2. Reduced methane production
3. Reduced electricity consumption

Select the correct answer using the code given below:
a) 1 and 2 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3

Answer – D

• System of Rice Intensification (SRI) was first developed in Madagascar in the 1980s. It promises to save 15 – 20% of groundwater and improve rice productivity.
• Option 1 is correct: Under SRI 2kgs seed is required to grow a nursery for one acre against 5kgs seed required in the traditional method.
• Option 2 is correct: By minimizing water use and alternating wet and dry conditions, SRI minimizes methane production.
• Option 3 is correct: A study carried out in Vietnam found that applying SRI methods can save around 23% of energy inputs while increasing energy outputs by 11%

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