Question

explain the following terms nitrogen fixation in simple line

Answer 1

conversion of nitrite and nitrides into nitrogen by some bacterias or any other methods is call nitrogen fixation.
rhizobium is one nitrogen fixation bacteria.

Answer 2

nitrogen fixation means taken atmospheric nitrogen for better development of plant in this process atmospheric nitrogen is absorbed by some lleguminous plants and bycow dunk and change atmosphere nitrogen into nitrate and used by plants for there better development sometimes nitrogen fertilisers is used