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 a longer time.Which of the statements given above is/are correct?
✓ Correct answer: d) 1, 2 and 3
ExplanationBiochar is a high-carbon, fine-grained residue that is currently produced through modern pyrolysis processes (direct thermal decomposition of biomass in the absence of oxygen and preventing combustion).The extremely porous nature of biochar is found to be effective at retaining both water and water-solu- ble nutrients.When applied to soil, biochar can improve water retention, increase soil fertility, and enhance microbial activi- ty, leading to better crop yields.Environment and Ecology 483Statement 1 is correct: The use of biochar in vertical farming, part of the growing medium, can increase output significantly.As biochar migrates vertically through the soil profile, therefore can be used as a part of the growing medium in vertical farming.Statement 2 is correct: Its presence on the earth can improve water quality, increase soil fertility, raise agricultural pro- ductivity, and reduce pressure on old-growth forests.Using biochar in the soil promotes the growth of nitrogen-fixing mi- croorganisms.Statement 3 is correct: Biochar is hygroscopic.Thus it is a de- sirable soil m
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