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?
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A hard Environment multiple-choice question from UPSC Prelims 2020. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: D. 1, 2 and 3
All three are correct — biochar can serve as a growing medium (including in vertical farming), it supports nitrogen-fixing microorganisms, and its porous structure helps the medium retain water for longer.
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