Aquatic fern which is an excellent biofertilizerA. SalviniaB. AzollaC. – InterviewSolution

1.	Aquatic fern which is an excellent biofertilizerA. SalviniaB. AzollaC. MarsileaD. Pteridium
Answer» Correct Answer - 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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