8th Class Science Crop Production and Management Question Bank Crop Production and Management

  • question_answer
    Following are given the differences between manures and fertilisers. Which of the given differences are incorrect?
    Manures Fertilisers
    (i) They are not soluble in water. So they are not easily absorbed by the roots of the plants. They are soluble in water and are absorbed by the plants easily.
    (ii) These are inorganic substances. These are organic substances.
    (iii) Excessive use does not harm the soil texture, they provide humus to the soil. Excessive use can change the chemical composition of the soil and also pollutes water.
    (iv) They restore the soil texture and help in water retention. They may damage the soil texture.
    (v) These are nutrient specific. These are not nutrient specific.

    A) (ii) and (v) only

    B) (i), (ii) and (v) only

    C) (iii) and (iv) only

    D) (i), (iii) and (v) only

    Correct Answer: A


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