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

120 Soil Survey of
• the poorly drained Will 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
• “Forestland” section
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
969F—Casco-Rodman complex, 20 to 30
percent slopes
Setting
Landform: Stream terraces, kames, outwash plains,
and moraines
Position on the landform: Backslopes
Slope range: 20 to 30 percent
Typical soil series descriptions with range in
characteristics are 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
Casco and similar soils: 50 percent
Rodman and similar soils: 40 percent
Dissimilar soils: 10 percent
Similar soils:
• soils that contain carbonates at or near the surface
• soils that contain sandy and gravelly deposits at a
depth of more than 20 inches
• soils that have slopes of less than 20 percent or
more than 30 percent
• soils that are moderately eroded
• soils that contain loamy till in the lower part of the
profile
Dissimilar soils:
• the somewhat poorly drained Kane soils in the
lower positions on the landform
• the poorly drained Will soils in depressions
Management
For general and detailed information about
managing this map unit, see the following sections in
Part II of this publication:
• “Forestland” section
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
Rush Series
Drainage class: Well drained
Permeability: Moderate in the upper part and very
rapid in the lower part
Landform: Outwash plains, stream terraces, and
kames
Parent material: Silty material and the underlying
loamy and gravelly outwash
Slope range: 0 to 6 percent
Taxonomic classification: Fine-silty, mixed, mesic
Typic Hapludalfs
Typical Pedon for MLRA 95B
Typical pedon of Rush silt loam, 0 to 2 percent slopes,
175 feet south and 470 feet west of the northeast
corner of sec. 15, T. 39 N., R. 8 E.
A—0 to 4 inches; very dark gray (10YR 3/1) silt loam,
brown (10YR 5/3) dry; weak very fine granular
structure; very friable; common very fine roots;
slightly acid; abrupt smooth boundary.
E—4 to 11 inches; 60 percent dark grayish brown
(10YR 4/2) and 40 percent brown (10YR 4/3) silt
loam; weak thick platy structure; friable; common
very fine roots; strongly acid; abrupt smooth
boundary.
Bt1—11 to 18 inches; 55 percent brown (10YR 4/3)
and 45 percent dark yellowish brown (10YR 4/4)
silty clay loam; weak very fine subangular blocky
structure; friable; common very fine roots; strongly
acid; clear smooth boundary.
Bt2—18 to 24 inches; dark yellowish brown (10YR
4/4) silty clay loam; moderate fine subangular
blocky structure; firm; common very fine roots;
common distinct brown (10YR 4/3) clay films on
faces of peds; moderately acid; clear smooth
boundary.
Bt3—24 to 32 inches; dark yellowish brown (10YR
4/4) silty clay loam; moderate medium subangular
blocky structure; firm; few very fine roots; common
distinct brown (10YR 4/3) clay films on faces of
peds; slightly acid; clear smooth boundary.
Bt4—32 to 38 inches; dark yellowish brown (10YR
4/4) silty clay loam; weak coarse subangular
blocky structure; firm; few very fine roots; few
distinct brown (10YR 4/3) and dark brown (10YR
3/3) clay films on faces of peds; slightly acid;
abrupt smooth boundary.
2Bt5—38 to 45 inches; dark yellowish brown (10YR