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Adding lime to an acidic soil generally

  • A.Converts existing humus back into plant cellulose
  • B.Increases bacterial activity, including nitrification
  • C.Reduces microbial activity of every kind in the soil
  • D.Has no measurable effect on the soil organisms present

Answer: B

Raising pH towards neutral suits bacteria and especially the nitrifiers, which prefer conditions above about pH 7, so mineralisation and nitrification both speed up. Fungi lose the competitive advantage that acidity gave them.

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