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      Question

      Bolting in onion is mainly induced

      by:
      A High temperature only Correct Answer Incorrect Answer
      B Low temperature only Correct Answer Incorrect Answer
      C Excess nitrogen Correct Answer Incorrect Answer
      D Both high and low temperatures Correct Answer Incorrect Answer

      Solution

      Exposure to cold triggers floral initiation, while high temperature accelerates bolting. Both stress conditions disturb normal bulb formation. This reduces yield quality.

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