खेती में बायोचार का क्या उपयोग है ?
- 1.बायोचार ऊर्ध्वाधर खेती (vertical farming) में वृद्धिकर माध्यम के अंश के रूप में प्रयुक्त किया जा सकता है ।
- 2.जब बायोचार वृद्धिकर माध्यम के अंश के रूप में प्रयुक्त किया जाता है, तो वह नाइट्रोजन-यौगिकीकारी सूक्ष्मजीवों की वृद्धि को बढ़ावा देता है ।
- 3.जब बायोचार वृद्धिकर माध्यम के अंश के रूप में प्रयुक्त किया जाता है, तब वह उस वृद्धिकर माध्यम की जलधारण क्षमता को अधिक लम्बे समय तक बनाए रखने में सहायक होता है ।
उपर्युक्त कथनों में से कौन-सा/से सही है/हैं ?
Read this question in English
What is the use of biochar in farming?
1. Biochar can be used as a part of the growing medium in vertical farming.
2. When biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms.
3. When biochar is a part of the growing medium, it enables the growing medium to retain water for longer time.
Which of the statements given above is/are correct?
(a) 1 and 2 only · (b) 2 only · (c) 1 and 3 only · (d) 1, 2 and 3
उत्तर और व्याख्या · explanation in English
Answer: (d) 1, 2 और 3
All three statements are correct: biochar, the porous charcoal made by heating plant waste without oxygen, can be mixed into growing media, it supports biological nitrogen fixation, and it helps the medium hold water for longer.
- ✓ 1. Biochar is a stable, porous carbon material that can be blended into potting and soil-less growing mixes, which is how vertical farms grow plants; UPSC's key accepts this use.
- ✓ 2. The IPCC lists enhanced biological nitrogen fixation among the effects of adding biochar to soil, along with lower nitrogen losses and less fertiliser need.
- ✓ 3. The IPCC notes that applying biochar enhances soil water-holding capacity, which raises resilience to drought.
Remember · Biochar (pyrolysed plant waste) locks up carbon and improves soil: more water held, more nitrogen fixed, less fertiliser needed.
Sources
- IPCC Special Report on Climate Change and Land, Chapter 4: Land Degradation ↗ “Additional climate benefits of biochar can arise through: reduced nitrogen fertiliser requirements, due to reduced losses of nitrogen through leaching and/or volatilisation (Singh et al. 2010 1434 ) and enhanced biological nitrogen fixation (Van Zwieten et al. 2015 1435 ) … application of compost or biochar that enhances soil water-holding capacity, so increases resilience to drought.”
Question and answer: UPSC's official GS Paper I (2020, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·