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Soils. Soil. Weathering and erosion transports materials across Earth’s surface The loose material covers most of Earth’s surface is a resource . Soil (not dirt) is a combination of weathered rock and organic material that can support plant life. Soil formation is a slow process.

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Presentation Transcript
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Soil
  • Weathering and erosion transports materials across Earth’s surface
  • The loose material covers most of Earth’s surface is a resource.
  • Soil (not dirt) is a combination of weathered rock and organic material that can support plant life.
  • Soil formation is a slow process.
soil formation
Soil Formation
  • Parent material – the material weathered into soil
  • Residual Soil –
    • Soil that contains weathered material that matches the local bedrock
    • The local bedrock was weathered in place and turned into soil. (Remember this is a very slow process)
  • Transported Soil
    • Soil that contains weathered material that is different from the local bedrock.
    • The rock material needed to make the soil was ‘transported’ (wind, water, glaciers)
    • NYS is mostly covered in transported soil
soil profiles
Soil Profiles
  • The ‘ideal’ soil profile is composed of 4 layers
    • O - organic
    • A - leaching
    • B - accumulation
    • C – weathered parent material
types of soil
Types of Soil
  • There are many different soils that are formed under unique conditions
  • Soil composition –
    • Inorganic material sand, silt, clay.
    • This material affects the amount of water within soil
    • sand dries out fast, clayey soil dries slower.
soil classification
Soil Classification
  • Different conditions lead to different soil types.
factors that influence soil development
Factors that influence Soil Development
  • Time
  • Parent Material
  • Plants and animals
  • Topography (slope)
  • Climate
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New York

Tennessee

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Houston, TX

North East US

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Tropical Soils:

  • Very thick B layer