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  3. 9th Class
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  5. Improvement in food resources

9th Class Science Improvement in food resources Question Bank Improvement in Food Resources

  • question_answer
    Which of the following is not an organic method used to control weeds?

    A) Proper seed beds

    B)        Weedicides  

    C) Intercropping

    D)        Crop rotation

    Correct Answer: B

    Solution :

    Weedicides consists of chemicals and artificial hormones which cause soil pollution.


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