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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2011

  • question_answer
    In paddy fields biological nitrogen fixation is chiefly brought by

    A)  cyanobacteria                  

    B)  green algae

    C)  mycorrhiza      

    D)         Rhizobium

    Correct Answer: A

    Solution :

    Non-symbiotic nitrogen fixation is carried out by Azotobacter, Clostridium, Azospirillum fungi and cyanobacteria (Nostoc, Anabaena).


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