Question

Write a note on nitrogen fixation?

Answer 1

Nitrogen fixation is the process of fixing free nitrogen into compounds. This takes place by the following means:

(a) Certain blue-green algae and bacteria can fix atmospheric nitrogen.

(b) Nitrogen fixing bacteria found in the nodules of roots of legumes such as gram, bean, pulses etc. fix atmospheric nitrogen into nitrogen containing compounds.

(c) Lightning also helps in the formation of nitrogen containing compounds.