Question

What do you mean by biological nitrogen fixation?

Answer 1

1. Biological nitrogen fixation means time conversion of atmospheric nitrogen into useful nitrogen compounds by bacteria and algae.
2. It is the conversion of atmospheric dinitrogen (N2) to ammonia (NH3) under the combined action of biological and chemical activities
3. The bacteria present in the root nodules of leguminous plants like Rhizobium as well as some blue green algae help in the fixation of atmospheric nitrogen.