9th Class Science Sample Paper Science Olympiad Model Test Paper-19

  • question_answer
    Which of the following statements is correct?

    A) Mixed cropping reduces the chance of pest infection on any one crop.

    B) Crop rotation leads to make soil infertile.

    C) In intercropping, always same crops are planted in different definite pattern

    D) All the above

    E) None of these

    Correct Answer: A


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