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

McHenry County, Illinois—Part I 43
• soils that contain carbonates at a depth of less than
60 inches
Dissimilar soils:
• the somewhat poorly drained Hoopeston soils in the
lower positions on the landform
• sandy soils in the slightly higher positions on the
landform
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
Dresden Series
Drainage class: Well drained
Permeability: Moderate in the upper part and very
rapid in the lower part
Landform: Outwash plains and stream terraces
Parent material: Loamy drift over sandy and gravelly
deposits
Slope range: 0 to 4 percent
Taxonomic classification: Fine-loamy over sandy or
sandy-skeletal, mixed, mesic Mollic Hapludalfs
Typical Pedon for MLRA 95B
Typical pedon of Dresden silt loam, 2 to 4 percent
slopes, 720 feet south and 1,340 feet west of the
center of sec. 21, T. 41 N., R. 8 E.
Ap—0 to 7 inches; very dark grayish brown (10YR
3/2) silt loam, grayish brown (10YR 5/2) dry; weak
very fine granular structure; friable; common very
fine roots; slightly acid; abrupt smooth boundary.
BA—7 to 11 inches; brown (10YR 4/3) silt loam; weak
very fine subangular blocky structure; friable;
common very fine roots; few distinct very dark
grayish brown (10YR 3/2) organic coatings on
faces of peds; neutral; clear smooth boundary.
Bt1—11 to 19 inches; brown (10YR 4/3) silty clay
loam; moderate fine subangular blocky structure;
friable; few very fine roots; common distinct dark
brown (10YR 3/3) clay films on faces of peds;
slightly acid; clear smooth boundary.
2Bt2—19 to 27 inches; dark yellowish brown (10YR
4/4) clay loam; moderate fine and medium
subangular blocky structure; friable; few very fine
roots; common distinct brown (10YR 4/3) clay
films on faces of peds; 5 percent gravel; slightly
acid; clear smooth boundary.
2Bt3—27 to 32 inches; dark yellowish brown (10YR
4/4) sandy clay loam; weak coarse subangular
blocky structure; friable; few very fine roots;
common distinct brown (7.5YR 4/3) and dark
brown (7.5YR 3/3) clay films on faces of peds;
13 percent gravel; neutral; abrupt smooth
boundary.
3C—32 to 60 inches; yellowish brown (10YR 5/4)
gravelly sand; single grain; loose; 34 percent
gravel; strongly effervescent; moderately alkaline.
MLRA Series Range in Characteristics
Depth to sandy and gravelly deposits: 24 to 40 inches
Depth to carbonates: 24 to 40 inches
Thickness of the solum: 24 to 40 inches
Ap or A horizon:
Hue—10YR
Value—2 or 3
Chroma—2 or 3
Texture—silt loam or loam
Bt or 2Bt horizon:
Hue—7.5YR or 10YR
Value—4 or 5
Chroma—3 or 4
Texture—silty clay loam, clay loam, loam, or
sandy clay loam
3C horizon:
Hue—7.5YR or 10YR
Value—4 or 5
Chroma—3 to 6
Texture—the gravelly, very gravelly, or extremely
gravelly analogs of sand, loamy sand, coarse
sand, or loamy coarse sand
Content of gravel—20 to 70 percent
325A—Dresden silt loam, 0 to 2 percent
slopes
Setting
Landform: Outwash plains and stream terraces
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.