A) Rhizobium
B) Azolla
C) Anthoceros
D) Bacillus polymyxa
Correct Answer: B
Solution :
Best biofertilizer for paddy fields is Azolla and blue-green algae. Azolla possesses colonies of Anabaena or Nostoc as endophytic symbiont and helps in nitrogen fixation.You need to login to perform this action.
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