3 Horizons

3 Horizons

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Storyboard Text

  • A-Horizon / Top-Soil
  • The A-horizon is made up of Humus, organic matter, water and air. This is the layers of soil that supports most organisms being very fertile. 
  • The B-horizon is made up silt, clay and sand. This layer is less fertile than the A-horizon with little organic matter being present.
  • B-Horizon / Sub-Soil
  • The C-horizon is made up of weathered parent rock and little humus. This layer possesses very little to no organic matter being very infertile and supporting few organisms.
  • C-Horizon / Parent Material
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