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AMU Medical AMU Solved Paper-2007

  • question_answer
    A water fern which is used as a green manure in rice fields is

    A)  Salvinia                                               

    B)  Mucor

    C)  Aspergillus                        

    D)  Azolla

    Correct Answer: D

    Solution :

                     The leaves of Azolla (water fern) contain upto 80,000 Anabaena azollae which fix atmospheric nitrogen and make it available to AzollcL Azolla is cultivated in rice fields as it provides both green compost and fixed nitrogen to the crop.


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