Question

What do you mean by the following term?

Nitrogen fixation

Answer 1

It is the chemical process by which free atmospheric nitrogen (N₂) is converted into useful nitrogenous compounds (such as nitrates or ammonia) that can be easily absorbed and utilised by plants.

Examples: Natural nitrogen fixation occurs during lightning or by symbiotic bacteria (like Rhizobium) present in the root nodules of leguminous plants.