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Aquatic fern which is an excellent biofe...

Aquatic fern which is an excellent biofertilizer

A

Salvinia

B

Azolla

C

Marsilea

D

Pteridium

Text Solution

Verified by Experts

The correct Answer is:
B
Azolla pinnata (aquatic fern) is a symbiotic nitrogen fixing cyanobacteria which is inoculated in rice fields in south eastern Asia and found to increase yield upto 50%.
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