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      Question

      What makes vermiculite an advantageous component in a

      growing mix?
      A Its high alkalinity Correct Answer Incorrect Answer
      B Its heavy density Correct Answer Incorrect Answer
      C Its high capacity for aeration Correct Answer Incorrect Answer
      D Its inability to hold water Correct Answer Incorrect Answer

      Solution

      When heated, this mineral expands into accordion-like particles that create air pockets in the soil. These pockets ensure that roots receive the oxygen they need to grow.

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