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      Question

      If for a rice variety, grain yield is 3.2t/ha and straw

      yield is 4.8t/ha, then the value of harvest index is ____
      A 30% Correct Answer Incorrect Answer
      B 68% Correct Answer Incorrect Answer
      C 40% Correct Answer Incorrect Answer
      D 55% Correct Answer Incorrect Answer

      Solution

      HI = Economic Yield/ Biological yield * 100 = 3.2/

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