Question

Microorganisms which is used for or helps in nitrogen fixation is _______

Answer 1

Answer:

cyanobacteria and azotobacter and clostridium.

Explanation:

Hope it helps! ! !

Answer 2

Answer:

Blue green algae Rhizobium bacteria are biological nitrogen fixers.

Explanation:

As we know that ,

The conversion of free atmospheric nitrogen gas into usable nitrogenous compounds is known as nitrogen fixation.

The microbes which fix atmospheric nitrogen as nitrates to enrich the soil with nitrogen and increase the fertility of soil are called biological nitrogen fixers.