A nitrogen-fixing microbe associated with Azo | vedclass

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Question

(B) : $Azolla$ plays a very important role in rice production.$Azolla$ and its nitrogen-fixing partner,$Anabaena$,have been used as green manure to fe

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Anabaena

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(B) : $Azolla$ plays a very important role in rice production.$Azolla$ and its nitrogen-fixing partner,$Anabaena$,have been used as green manure to fertilise rice paddies and increase production.With the help of $Azolla$,rice can be grown year after year,several crops a year,with little or no decline in productivity; hence no rotation of crops is necessary.

$A$ nitrogen-fixing microbe associated with $Azolla$ in rice fields is

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