Nitrogen fixation is a significant event in both the nitrogen cycle and plant growth.
Leguminous plants have a lot of nitrogen fixation mechanisms.
There are two types of nitrogen-fixing bacteria: free-living or non-symbiotic bacteria and symbiotic bacteria.
Free living bacteria:These bacteria are free-living and are not connected to any element of the plant.
Some examples of free-living nitrogen-fixing microorganisms are as follows: Clostridium, Nostoc, Anabaena, and Azotobacter are some of the most common bacteria.
Bacteria that are symbiotic or mutualistic: These bacteria infiltrate the plant's root system and produce root nodules.
Plants serve as hosts for these bacteria.
This is where nitrogen from the atmosphere is transformed to ammonia.
Rhizobium and Azospirillum are examples of symbiotic microorganisms.