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Azolla is used as biofertilizer as it ha...

Azolla is used as biofertilizer as it has

A

Rhizobium

B

Cyanobacteria

C

Mycorrhiza

D

Large quantity of humus

Text Solution

Verified by Experts

The correct Answer is:
B
Azolla has been used from many years in rice paddies as a companion plant because of the presence of nitrogen fixing cyanobacteria in symbiosis with azolla and its tendency to block out light to prevent any competition from other plants
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