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Denitrification in nitrogen cycle happens in __________ conditions.

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Denitrification in nitrogen cycle happens in __________ conditions.

(a) Aerobic

(b) Humid

(c) Anaerobic

(d) Cold

This question was addressed to me in unit test.

This is a very interesting question from Various Cycles of Environment in chapter Other Major Topics in Civil Engineering of Basic Civil Engineering

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Right choice is (c) Anaerobic

Explanation: Denitrification refers to the process of reduction of nitrates back to nitrogen gas.  Pseudomonas bacteria makes this happen. It uses nitrates in the soil to carry out respiration and consequently, produce nitrogen gas.

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