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    Question

    Nitrogen deficiency symptoms first appear

    on
    A lower leaves Correct Answer Incorrect Answer
    B middle leaves Correct Answer Incorrect Answer
    C top leaves Correct Answer Incorrect Answer
    D mid ribs only Correct Answer Incorrect Answer

    Solution

    The examples of mobile elements are nitrogen (N), potassium (K) and phosphorus (P) and magnesium (Mg). They move from one place to another when there is any deficiency detected in plants. Even if there is deficiency like they are not absorbed at all, then the symptoms of deficiency are seen on older and lower leaves.

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