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

McHenry County, Illinois—Part I 65
slightly effervescent; slightly alkaline; clear smooth
boundary.
Bg2—30 to 38 inches; olive gray (5Y 5/2) loam;
moderate medium subangular blocky structure;
friable; few fine roots; common distinct dark gray
(5Y 4/1) coatings on faces of peds; very dark
grayish brown (2.5Y 3/2) loamy krotovinas;
common fine prominent strong brown (7.5YR 5/6)
masses of iron accumulation in the matrix; few
fine faint dark gray (5Y 4/1) iron depletions in the
matrix; 4 percent gravel; strongly effervescent;
slightly alkaline; clear smooth boundary.
2BCg—38 to 44 inches; dark grayish brown (2.5Y 4/2)
sandy loam; weak medium subangular blocky
structure; friable; few fine roots; common distinct
dark gray (5Y 4/1) coatings on faces of peds;
black (10YR 2/1) loamy krotovinas; few fine
prominent strong brown (7.5YR 5/6) masses of
iron accumulation in the matrix; few fine distinct
gray (5Y 5/1) iron depletions in the matrix; slightly
effervescent; slightly alkaline; clear smooth
boundary.
2Cg—44 to 60 inches; very dark gray (5Y 3/1) and
grayish brown (2.5Y 5/2) sand; single grain; loose;
few fine prominent yellowish brown (10YR 5/6)
masses of iron accumulation in the matrix; slightly
effervescent; slightly alkaline.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 24 inches
Depth to sandy outwash: 40 to 60 inches
Depth to carbonates: Less than 10 inches
Thickness of the solum: 30 to 50 inches
Apk or A horizon:
Hue—10YR, 2.5Y, or N
Value—2 or 3
Chroma—0 to 2
Texture—loam, silt loam, clay loam, or silty clay
loam
Bg or 2BCg horizon:
Hue—10YR, 2.5Y, or 5Y
Value—4 to 6
Chroma—1 or 2
Texture—loam, silt loam, clay loam, sandy clay
loam, silty clay loam, or sandy loam
Content of gravel—0 to 10 percent
2Cg horizon:
Hue—10YR, 2.5Y, or 5Y
Value—4 to 6
Chroma—1 to 3
Texture—sand or loamy sand
Content of gravel—0 to 15 percent
488A—Hooppole loam, 0 to 2 percent
slopes
Setting
Landform: Outwash plains and stream terraces
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
Hooppole and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have no subsurface layers and are lighter
colored in the upper part of the subsoil
• soils that contain less sand in the upper and middle
parts of the profile
• 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 Lahoguess soils in the
higher positions on the landform
• the very poorly drained Houghton and Lena soils in
depressions
• Will soils, which contain sandy and gravelly
deposits at a depth of less than 40 inches; in positions
on the landform similar to those of the Hooppole soil
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
1488A—Hooppole loam, 0 to 2 percent
slopes, undrained
Setting
Landform: Outwash plains and stream terraces
Position on the landform: Depressions
Slope range: 0 to 2 percent