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UPSC 2020: 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
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Not attemptedCorrect Answer: (d) 1, 2 and 3
Biochar, a porous carbon-rich solid, is now used in soilless substrates for vertical farming; its high surface area improves habitat for nitrogen-fixing microbes and its porosity increases the medium’s water-holding capacity. Hence all three listed benefits are valid, making option (d) correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2020-question-80/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2020 Environment & Ecology question?▼
The correct answer is option (d): 1, 2 and 3. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Sustainable Agriculture & Forestry question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2020, GS Paper 1, as Question 80. It falls under Environment & Ecology > Sustainable Agriculture & Forestry.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Sustainable Agriculture & Forestry?▼
UPSC has asked 31 questions from Sustainable Agriculture & Forestry (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.