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7th Class Science Soil Question Bank Soil

  • question_answer
    DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 The chemical substances which are rich from nutrients and used to maintain soil fertility are called fertilizers. They also produce harmful effects. They remain in the soil and spoil porous structure of the soil which is essential for plant growth. They also kill the soil organisms like earthworms. Earthworms burrows and loosens the soil and make it porous. Which of the following worms creates soil porousity and get killed by fertilizers?

    A) Ringworm       

    B) Flatworm

    C) Earthworm     

    D) Silkworm

    Correct Answer: C

    Solution :

    Earthworm makes burrows into the soil, thus mixing the soil well, and its excreta called worm cast enriches the soil with nitrogen.


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