Depending upon the need of the soil and type of crop you are harvesting various types of biofertilizers are available in the market. Some of them are:
Symbiotic nitrogen-fixing bacteria: Rhizobium is the symbiotic nitrogen-fixing bacteria that take shelter and obtains food from plants and in return provides fixed nitrogen to the plants.
Symbiotic nitrogen-fixing cyanobacteria: It is also known as blue-green algae and some of the cyanobacteria are liverworts, cycad roots, and lichens.
Free-living nitrogen-fixing bacteria: These types of bacteria are freely available in the soil and perform nitrogen fixation.

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