First slide

Microbes as Biofertilisers

Question

The free-living nitrogen-fixing bacteria found in soil are

Easy

A

Rhizobium and Frankia
B

Azolla and Nostoc
C

Azospirillum and Azotobacter
D

Frankia and Oscillatoria

Solution

Bacteria can fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter), thus enriching the nitrogen content of the soil.

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