Soil Survey of McHenry County, Illinois Part I - Soil Data Mart

McHenry County, Illinois—Part I 59
and sandy loam; massive; friable; few very fine
roots; many fine and medium prominent dark
yellowish brown (10YR 4/4) masses of iron
accumulation in the matrix; 5 percent gravel;
violently effervescent; moderately alkaline.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 22 inches
Thickness of silty material: 30 to 60 inches
Depth to carbonates: Less than 10 inches
Thickness of the solum: 22 to 46 inches
Apk, Ak, Ap, or A horizon:
Hue—10YR, 2.5Y, 5Y, or N
Value—2 or 3
Chroma—0 or 1
Texture—silt loam or silty clay loam
Bg or Bkg horizon:
Hue—10YR, 2.5Y, 5Y, or N
Value—4 to 6
Chroma—0 to 2
Texture—silty clay loam, silt loam, loam, or clay
loam
Cg horizon:
Hue—10YR, 2.5Y, or 5Y
Value—4 to 6
Chroma—1 to 4
Texture—silty clay loam, silt loam, loam, or sandy
loam
67A—Harpster silty clay loam, 0 to 2
percent slopes
Setting
Landform: Outwash plains and moraines
Position on the landform: Footslopes and toeslopes
Slope range: 0 to 2 percent
A typical soil series description with range in
characteristics is included, in alphabetical order, in this
section. Additional information specific to this map
unit, such as horizon depth and textures, is available
in the “Soil Properties” section in Part II of this
publication.
Composition
Harpster and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that contain more sand in the subsoil
• soils that are darker in the upper part of the subsoil
• soils that contain more gravel in the lower part of
the profile
• soils that do not contain carbonates at or near the
surface
Dissimilar soils:
• the somewhat poorly drained Brenton and Millbrook
soils in the higher positions on the landform
• the very poorly drained Houghton and Lena soils in
depressions
Management
For general and detailed information about
managing this map unit, see the following sections in
Part II of this publication:
• “Agronomy” section
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
1067A—Harpster silt loam, 0 to 2 percent
slopes, undrained
Setting
Landform: Outwash plains and moraines
Position on the landform: Depressions
Slope range: 0 to 2 percent
A typical soil series description with range in
characteristics is included, in alphabetical order, in this
section. Additional information specific to this map unit,
such as horizon depth and textures, is available in the
“Soil Properties” section in Part II of this publication.
Composition
Harpster and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that contain more sand in the subsoil
• soils that are darker in the upper part of the subsoil
• soils that contain more gravel in the lower part of
the profile
• soils that do not contain carbonates at or near the
surface
Dissimilar soils:
• the somewhat poorly drained Brenton and Millbrook
soils in the higher positions on the landform
• the very poorly drained Houghton and Lena soils in
positions on the landform similar to those of the
Harpster soil
Management
For general and detailed information about
managing this map unit, see the following sections in
Part II of this publication: