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    Question

    Depression in efficiency of Rhizobium is due

    to:
    A Iron application Correct Answer Incorrect Answer
    B Phosphorus application Correct Answer Incorrect Answer
    C Potash application Correct Answer Incorrect Answer
    D Excessive nitrogen use Correct Answer Incorrect Answer

    Solution

    When legume crops receive excessive nitrogen fertilizer, they may become less reliant on the nitrogen-fixing symbiosis with Rhizobium bacteria, leading to reduced nodulation and nitrogen fixation efficiency.

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