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

McHenry County, Illinois—Part I 115
(10YR 5/6) and 50 percent dark yellowish brown
(10YR 4/4), stratified sandy loam, loam, and
loamy sand; massive; very friable; few fine distinct
grayish brown (10YR 5/2) iron depletions in the
matrix; slightly acid.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 18 inches
Thickness of silty material: 20 to 40 inches
Depth to carbonates: Greater than 40 inches
Thickness of the solum: 40 to 65 inches
Ap or A horizon:
Hue—10YR
Value—2 or 3
Chroma—1 to 3
Texture—silt loam
Bt horizon:
Hue—10YR
Value—4 or 5
Chroma—3 or 4
Texture—silty clay loam
2Bt horizon:
Hue—7.5YR or 10YR
Value—4 to 6
Chroma—3 to 6
Texture—loam, silt loam, sandy loam, clay loam,
or sandy clay loam
2C horizon:
Hue—7.5YR or 10YR
Value—4 to 6
Chroma—3 to 6
Texture—loam, silt loam, sandy loam, or loamy
sand
Content of gravel—less than 15 percent
148A—Proctor silt loam, 0 to 2 percent
slopes
Setting
Landform: Outwash plains, stream terraces, and
moraines
Position on the landform: Summits
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
Proctor and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have a thinner surface layer
• soils that contain loamy outwash at a depth of more
than 40 inches
• soils that have a seasonal high water table at a
depth of less than 6 feet
• soils that contain more sand in the upper part of the
subsoil
• soils that contain sandy and gravelly deposits in the
lower part of the profile
Dissimilar soils:
• the somewhat poorly drained Brenton and Millbrook
soils in the lower positions on the landform
• the poorly drained Pella soils in depressions and
drainageways
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
148B—Proctor silt loam, 2 to 5 percent
slopes
Setting
Landform: Outwash plains, stream terraces, and
moraines
Position on the landform: Summits, shoulders, and
backslopes
Slope range: 2 to 5 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
Proctor and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have slopes of less than 2 percent