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    Which of the following biofertilizers fixes nitrogen in symbiotic association with leguminous plants?
    Question

    Which of the following biofertilizers fixes nitrogen in symbiotic association with leguminous plants?

    A.

    Rhizobium

    B.

    Azolla

    C.

    Phosphobacteria

    D.

    Mycorrhiza

    E.

    None of the above

    Correct option is A

    Rhizobium fixes nitrogen in a symbiotic relationship with leguminous plants, forming root nodules that help improve soil fertility.

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