`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 t

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Q: 22 (IAS/2022)
'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_subject: 

Science

question_exam: 

IAS

stats: 

0,189,111,46,44,21,189

keywords: 

{'rice intensification': [0, 0, 0, 1], 'rice fields': [0, 0, 2, 1], 'cultivation': [2, 1, 1, 0], 'reduced methane production': [0, 0, 0, 1], 'alternate wetting': [0, 0, 0, 1], 'reduced seed requirement': [0, 0, 0, 1], 'system': [8, 3, 7, 23], 'reduced electricity consumption': [0, 0, 0, 1]}

  1. The System of Rice Intensification (SRI) is a method of rice cultivation that was developed in Madagascar in the 1980s. It involves several agronomic practices such as transplanting young seedlings, wider spacing between plants, intermittent watering, and use of organic fertilizers. The alternate wetting and drying (AWD) of rice fields is one of the key features of the SRI method.

    The benefits of the System of Rice Intensification include:

  2. Reduced seed requirement: SRI requires significantly fewer seeds compared to conventional rice cultivation methods. The method involves planting single seedlings rather than clumps, which leads to better root development and plant growth.

  3. Reduced methane production: AWD of rice fields reduces methane emissions from rice paddies by up to 50%. Methane is a potent greenhouse gas that contributes to global warming.

  4. Therefore, all the given options 1, 2 and 3 are correct.

  5. Reduced electricity consumption: SRI requires less water compared to conventional rice cultivation methods, reducing the need for pumping and irrigation. This results in reduced electricity consumption.

Preparing for Future Exams: Learning from the Analysis of Past Questions

Topics to study:

  • System of Rice Intensification (SRI) and its components
  • Alternate wetting and drying (AWD) of rice fields
  • Benefits of SRI: Reduced seed requirement, Reduced methane production, and Reduced electricity consumption
  • Sustainable agriculture practices

Sources to consider:

NCERT Chapters:

  • Class 10: Chapter 15 (Biodiversity and Conservation)
  • Class 12: Chapter 16 (Environmental Issues)

Related Concepts:

  • Agroecology
  • Greenhouse gas emissions
  • Water management
  • Sustainable development
  • Climate change