2. Sample Papers
  3. 9th Class
  4. Science

9th Class Science Sample Paper Science Olympiad Model Test Paper-14

  • question_answer
    Crop rotation is essential for which one of the following reason?

    A) Getting different kinds of crops

    B) Increasing the quality of minerals

    C) Increasing the quality of proteins

    D) Increasing the fertility of soils

    E) None of these

    Correct Answer: D

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