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      Question

      If the plant is exhibiting marginal burning or scorched

      appearance in lower leaves, this is due to which of the following?
      A Nitrogen deficiency Correct Answer Incorrect Answer
      B Potassium deficiency Correct Answer Incorrect Answer
      C Magnesium toxicity Correct Answer Incorrect Answer
      D Calcium deficiency Correct Answer Incorrect Answer
      E Manganese toxicity Correct Answer Incorrect Answer

      Solution

      Potassium deficiency in plants often manifests as marginal burning or scorching of the leaves, particularly in the older or lower leaves. This symptom is commonly referred to as marginal leaf necrosis or marginal leaf scorch. The lack of sufficient potassium affects various physiological processes in plants, including the regulation of water balance, stomatal function, and enzyme activation.

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