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Biological Classification

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Biological Classification
  1. A good green manure in rice fields is
    1. Aspergillus
    2. Azolla
    3. Salvinia
    4. Mucor
Correct Option: B

Aspergillus is a fungus, Mucor is also a fungus. Azolla harbors blue-green algae Anabaena which fixes N2, increasing fertility.


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