Question

The process that releases free nitrogen back into the air is known as *



(a) Ammonification

(b) Nitrification

(c) Denitrification

(d) Purification

​

Answer 1

Answer:

Nitrogen is returned to the atmosphere by the activity of organisms known as decomposers. Some bacteria are decomposers and break down the complex nitrogen compounds in dead organisms and animal wastes. This returns simple nitrogen compounds to the soil where they can be used by plants to produce more nitrates.

Answer 2

(a) Ammonification

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