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Soil, well-formed, distinct PEDs, not distinct in undisturbed soil -…

- - - - Hard rock weathered into soft clay
      - Dead leaves decompose into humus
      - Minerals Breaking Down
- - - - sand: Gritty, lots of air
      - 2.0-0.05mm
    - - less than 0.002mm
      - Sticky
    - - Slippery, holds water & nutrients
      - Moderates Other Textures
    - - flourly / slippery / compactable
      - 0.05-0.002mm
- - - - Erosion over time
      - Horizons
      - organic matter growing
    - - Biological mixing
      - vegetation
    - - material the soil is made from
      - transported material
      - organic materials decomposing
    - - poorer soil on steep slopes
      - shape of the slope (mounded, or unbroken)
    - - Impacts plant growth
      - dissolves material