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

80 Soil Survey of
6/2) iron depletions in the matrix; 2 percent gravel;
neutral; clear wavy boundary.
BCg—38 to 46 inches; grayish brown (2.5Y 5/2) sandy
loam; weak medium subangular blocky structure;
friable; common very fine roots; common medium
dark gray (10YR 4/1) and very dark gray (10YR
3/1) krotovinas; common fine and medium
prominent brownish yellow (10YR 6/6) masses of
iron accumulation in the matrix; many fine and
medium faint light brownish gray (2.5Y 6/2) iron
depletions in the matrix; 2 percent gravel; neutral;
abrupt smooth boundary.
2C—46 to 60 inches; 60 percent light olive brown
(2.5Y 5/3) and 40 percent light yellowish brown
(2.5Y 6/3), stratified loamy sand and sand; single
grain; loose; 1 percent gravel; slightly alkaline.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 20 inches
Depth to sandy outwash: 35 to 55 inches
Thickness of the solum: 35 to 55 inches
Ap or A horizon:
Hue—10YR
Value—2 or 3
Chroma—1 to 3
Texture—loam or silt loam
Bt horizon:
Hue—10YR or 2.5Y
Value—4 to 6
Chroma—2 to 6
Texture—clay loam, loam, sandy clay loam, or
sandy loam
2C horizon:
Hue—7.5YR, 10YR, or 2.5Y
Value—4 to 6
Chroma—2 to 8
Texture—sand or loamy sand
Content of gravel—0 to 15 percent
528A—Lahoguess loam, 0 to 2 percent
slopes
Setting
Landform: Outwash plains and stream terraces
Position on the landform: Footslopes
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
Lahoguess and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that contain less sand and more silt in the
upper and middle parts of the profile
• soils that have sandy outwash at a depth of less
than 35 inches
• soils that have no subsurface layers
• soils that contain less clay in the upper and middle
parts of the profile
Dissimilar soils:
• the well drained Dakota soils in the higher positions
on the landform
• the poorly drained Selmass 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
La Rose Series
Drainage class: Well drained
Permeability: Moderate in the upper part and
moderately slow in the lower part
Landform: Moraines and till plains
Parent material: Loamy till
Slope range: 5 to 10 percent
Taxonomic classification: Fine-loamy, mixed, mesic
Typic Argiudolls
Typical Pedon for MLRA 95B
Typical pedon of La Rose loam, 5 to 10 percent
slopes, eroded, 2,440 feet north and 2,200 feet west
of the southeast corner of sec. 23, T. 44 N., R. 6 E.
Ap—0 to 7 inches; 97 percent very dark grayish brown
(10YR 3/2) and 3 percent dark brown (7.5YR 3/4)
loam, brown (10YR 5/3) dry; weak medium
subangular blocky structure parting to weak fine
and medium granular; friable; common very fine
roots; 2 percent gravel; neutral; abrupt smooth
boundary.
BA—7 to 11 inches; 75 percent dark brown (7.5YR
3/4) and 25 percent very dark grayish brown
(10YR 3/2) clay loam; weak medium subangular