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      Question

      What should be added to a heavy soil mix to increase

      aeration?
      A Fine clay Correct Answer Incorrect Answer
      B Dusty silt Correct Answer Incorrect Answer
      C Perlite or Vermiculite Correct Answer Incorrect Answer
      D Crushed limestone Correct Answer Incorrect Answer

      Solution

      These materials are very porous and don't break down easily. They create permanent "tunnels" in the soil that allow air to reach the roots.

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