Which of the following is a biofertilizer rep | vedclass

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(B) $Azolla$ $pinnata$ is a small aquatic fern that has a symbiotic relationship with the nitrogen-fixing cyanobacterium $Anabaena$ $azollae$. This fe

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Azolla pinnata

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(B) $Azolla$ $pinnata$ is a small aquatic fern that has a symbiotic relationship with the nitrogen-fixing cyanobacterium $Anabaena$ $azollae$. This fern is widely used as a biofertilizer in rice fields because it fixes atmospheric nitrogen and provides it to the rice plants. Studies have shown that the use of $Azolla$ can increase rice production by more than $50\%$ due to the enrichment of soil nitrogen content.

Which of the following is a biofertilizer reported to increase rice production by more than $50\%$?

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