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

40 Soil Survey of
matrix; common fine faint grayish brown (10YR
5/2) iron depletions in the matrix; neutral; clear
wavy boundary.
2Bt4—33 to 42 inches; brown (7.5YR 5/4) clay loam;
weak medium prismatic structure parting to
moderate medium subangular blocky; friable; few
very fine roots; common distinct brown (10YR 4/3)
clay films on faces of peds and in pores; common
fine very dark gray (7.5YR 3/1) very weakly
cemented iron and manganese oxide concretions
throughout; common fine prominent yellowish
brown (10YR 5/6) masses of iron accumulation in
the matrix; few fine prominent light brownish gray
(10YR 6/2) iron depletions in the matrix; 6 percent
gravel; slightly alkaline; clear wavy boundary.
2BC—42 to 50 inches; brown (7.5YR 5/4) loam; weak
medium prismatic structure parting to weak
medium subangular blocky; friable; common fine
prominent yellowish brown (10YR 5/6) masses of
iron accumulation in the matrix; common fine
prominent light brownish gray (10YR 6/2) iron
depletions in the matrix; 8 percent gravel; strongly
effervescent; slightly alkaline; gradual wavy
boundary.
2C—50 to 60 inches; brown (7.5YR 5/4) loam;
massive; friable; many fine prominent yellowish
brown (10YR 5/6) masses of iron accumulation in
the matrix; common fine prominent light brownish
gray (10YR 6/2) iron depletions in the matrix; 10
percent gravel; strongly effervescent; slightly
alkaline.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 20 inches
Thickness of silty material: 22 to 40 inches
Depth to carbonates: 30 to 50 inches
Thickness of the solum: 36 to 60 inches
Ap or A horizon:
Hue—10YR
Value—2 or 3
Chroma—1 to 3
Texture—silt loam
Bt horizon:
Hue—10YR
Value—4 to 6
Chroma—3 or 4
Texture—silty clay loam or silt loam
2Bt or 2BC horizon:
Hue—7.5YR or 10YR
Value—4 to 6
Chroma—3 to 6
Texture—clay loam, loam, or sandy clay loam
Content of gravel—2 to 10 percent
2C horizon:
Hue—7.5YR
Value—4 to 6
Chroma—3 to 6
Texture—loam or sandy loam
Content of gravel—5 to 15 percent
512A—Danabrook silt loam, 0 to 2
percent slopes
Setting
Landform: Moraines and till plains
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
Danabrook and similar soils: 90 percent
Dissimilar soils: 10 percent
Similar soils:
• soils that have slopes of more than 2 percent
• soils that have no subsurface layer
• soils that have a seasonal high water table at a
depth of less than 2 feet or more than 3.5 feet
• soils that contain more sand in the upper and
middle parts of the subsoil
Dissimilar soils:
• the poorly drained Drummer soils in 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
512B—Danabrook silt loam, 2 to 5
percent slopes
Setting
Landform: Moraines and till plains
Position on the landform: Summits, shoulders, and
backslopes