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

106 Soil Survey of
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
1100A—Palms muck, 0 to 2 percent
slopes, undrained
Setting
Landform: Moraines, outwash plains, and stream
terraces
Position on the landform: Depressions
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
Palms and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have organic deposits greater than 51
inches thick
• soils in which the surface layer has a lower content
of organic matter
• soils that are sandy in the lower part of the profile
• soils that contain carbonates at or near the surface
Dissimilar soils:
• the poorly drained Drummer, Dunham, Pella, and
Selmass 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:
• “Forestland” section
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
Parmod Series
Drainage class: Well drained
Permeability: Moderate
Landform: Moraines and till plains
Parent material: Thin mantle of silty material and the
underlying loamy till
Slope range: 2 to 5 percent
Taxonomic classification: Fine-loamy, mixed, mesic
Typic Argiudolls
Typical Pedon for MLRA 95B
Typical pedon of Parmod silt loam, 2 to 5 percent
slopes, 696 feet north and 96 feet west of the
southeast corner of sec. 32, T. 21 N., R. 10 E.
Ap—0 to 8 inches; very dark gray (10YR 3/1) silt loam,
dark grayish brown (10YR 4/2) dry; weak fine
granular structure; friable; few fine roots; slightly
acid; abrupt smooth boundary.
AB—8 to 12 inches; very dark grayish brown (10YR
3/2) silt loam, grayish brown (10YR 5/2) dry;
moderate medium subangular blocky structure
parting to moderate fine granular; friable; few fine
roots; slightly acid; clear smooth boundary.
Bt1—12 to 19 inches; dark brown (10YR 4/3) silty clay
loam; moderate medium subangular blocky
structure; friable; few fine roots; common distinct
dark gray (10YR 3/1) organo-clay films on faces of
peds; moderately acid; clear smooth boundary.
2Bt2—19 to 26 inches; brown (10YR 4/3) clay loam;
moderate medium subangular blocky structure;
friable; few fine roots; common distinct dark brown
(10YR 3/3) clay films on faces of peds; slightly
acid; clear smooth boundary.
2Bt3—26 to 38 inches; dark yellowish brown (10YR
4/4) clay loam; moderate medium subangular
blocky structure; friable; few fine roots; common
distinct dark brown (10YR 3/3) clay films on faces
of peds; many fine black (7.5YR 2.5/1) iron and
manganese oxide concretions throughout; 3
percent pebbles (2 to 5 millimeters in diameter);
slightly acid; abrupt smooth boundary.
2C—38 to 60 inches; yellowish brown (10YR 5/4)
loam; massive; friable; few fine roots; common
fine black (7.5YR 2.5/1) iron and manganese
oxide concretions throughout; 10 percent pebbles
(2 to 10 millimeters in diameter) and 2 percent
pebbles (more than 10 millimeters in diameter);
strongly effervescent; slightly alkaline.
MLRA Series Range in Characteristics
Thickness of the mollic epipedon: 10 to 18 inches
Thickness of silty material: Less than 20 inches
Depth to carbonates: 20 to 40 inches
Thickness of the solum: 24 to 40 inches
Ap or A horizon:
Hue—10YR
Value—2 or 3