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    Question

    Which soil horizon is most affected by faunal

    pedoturbation?
    A O horizon Correct Answer Incorrect Answer
    B A horizon Correct Answer Incorrect Answer
    C B horizon Correct Answer Incorrect Answer
    D C horizon Correct Answer Incorrect Answer
    E R horizon Correct Answer Incorrect Answer

    Solution

    The A horizon (topsoil) is biologically active, where earthworms and insects mix organic and mineral materials.

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