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

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The correct Answer is:

B

Azolla is used as biofertiliser as it has cyanobacteria.

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Assertion a : Azolla is used as biofertilzer in rice fields Reason r: Azolla contains nitrogen fixing cyanobacteria in its root nodules

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