The process by which atmospheric nitrogen back in to atmosphere?

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Nitrate fertilizers

Nitrifying bacteria

Denitrifying bacteria

Nitrogen fixing

answer is C.

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Detailed Solution

Concept: Nitrogen cycles include processes like Nitrogen fixation, ammonification, nitrification, and ammonification. Denitrification is the process by which anaerobic bacteria convert nitrate into gaseous nitrogen. This is an anaerobic reaction.

Ammonification is the process of conversion of dead organic matter into ammonia.

Nitrogen-fixing bacteria are rhizobium bacteria that live in the root nodules of the plant.
The end product of the denitrification is nitrogen. This process takes place in the absence of oxygen. It is also referred to as a microbial process, as many types of bacteria are involved in this process. Eg: Denitrifying bacteria
Hence, the correct option is C.

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