How denitrification does occur in soils?
Correct answer: A. Bacterial reduction of NO3- ions to N2 gas.
- A. Bacterial reduction of NO3- ions to N2 gas.
- B. Active uptake of Nitrate ions by plant roots
- C. Drainage of manure from fields
- D. Leaching of nitrate ions
Explanation
Denitrification is a natural soil microbial process where nitrate ions are converted to nitrogen gas which is then lost to the atmosphere. Denitrification occurs when soil bacteria use nitrate for their respiration in place of oxygen in the air.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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