SOILS Lesson I

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SOILSLesson I

• Supplemental PowerPoint and Photos

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Part I Soil Profiles

• Background
• Soils have distinct profiles
• The profiles from the surface, downward are A, B
  and C with an eluviated layer or leaching between
  the A and B

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Part I Soil Profiles

• Students will be able to see a soil profile
  either from pictures on a PowerPoint or from an
  actual soil core taken near their school.
• Students should look at and feel the differences
  between the soil horizons and if the core has not
  been disturbed, notice clear distinctions.

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Soil Profile Pictures

• Using an auger in a soil core class, Raleigh,
  North Carolina

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Soil Profile Pictures
Raleigh, North Carolina
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Soil Profile Pictures
Ona, Florida
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Soil Profile Pictures
College Station, Texas
College Park, Maryland
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Part II Soil Textures

• Soil texture is very important when classifying
  soils, and mineral particles range in size
  throughout different soils.
• Particles are either defined as
• Sand
• Silt
• Clay

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Soil Triangle
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Part II Soil Textures

• Students will engage different soil types through
  a guided inquiry lab and classify according to
  texture.
• Students will be guided to observe by sight and
  touch each of the soil samples (ideally 9-12
  samples) and record observations
• Then back at their desks, students will try to
  classify the soils they encountered from their
  observations (using their own dichotomous key)

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Part II Soil Textures

• After students do their own classification, the
  teacher will discuss with the students why they
  chose to group certain soils together.
• Then students will be shown the soil triangle and
  told about the three soil particles and their
  sizes.

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U.S. Soil Regions (by type)
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