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    Question

    Which out of the following is considered as a

    biofertilizer in a paddy field?
    A Anabaena Correct Answer Incorrect Answer
    B Nostoc Correct Answer Incorrect Answer
    C Cyanobacteria Correct Answer Incorrect Answer
    D Oscillatoria Correct Answer Incorrect Answer

    Solution

    • Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen,
    • e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue green algae also add organic matter to the soil and increase its fertility.

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