Question

why does atmospheric nitrogen need to be converted​

Answer 1

Explanation:

In order for organisms to use atmospheric nitrogen (N2), it must be “fixed” or converted into ammonia (NH3).This is important because plants can assimilate nitrate into their tissues, and they rely on bacteria to convert it from ammonia to a usable form.

Answer 2

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.