Question

How is the level of nitrogen maintained in the atmosphere​

Answer 1

Answer:

Level of nitrogen in air = 78%

Answer 2

Answer:

Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants.

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