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

124 Soil Survey of
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
1529A—Selmass loam, 0 to 2 percent
slopes, undrained
Setting
Landform: Outwash plains and stream terraces
Position on the landform: Toeslopes
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
Selmass 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 contain sandy outwash at a depth of less
than 35 inches
• soils that have a thinner subsurface layer
• soils that contain less clay in the subsoil
Dissimilar soils:
• the well drained Dakota and somewhat poorly
drained Lahoguess soils in the higher positions on the
landform
• the calcareous Hooppole soils in positions on the
landform similar to those of the Selmass soil
• the very poorly drained Houghton and Palms soils
in depressions
Management
For general and detailed information about
managing this map unit, see the following sections in
Part II of this publication:
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
Senachwine Series
Drainage class: Well drained
Permeability: Moderate in the upper part and
moderately slow in the lower part
Landform: Moraines
Parent material: Thin mantle of silty material and the
underlying loamy till
Slope range: 12 to 30 percent
Taxonomic classification: Fine-loamy, mixed, mesic
Typic Hapludalfs
Typical Pedon for MLRA 95B
Typical pedon of Senachwine silt loam, 12 to 20
percent slopes, 1,620 feet south and 1,620 feet west
of the northeast corner of sec. 7, T. 43 N., R. 6 E.
A—0 to 4 inches; very dark gray (10YR 3/1) silt loam,
dark grayish brown (4/2) dry; strong very fine and
fine granular structure; friable; common very fine
and fine roots; 1 percent gravel; neutral; abrupt
smooth boundary.
E—4 to 9 inches; brown (10YR 5/3) loam, very pale
brown (10YR 7/3) dry; moderate thin platy
structure; friable; common very fine and fine roots;
many prominent light gray (10YR 7/2 dry) clay
depletions on faces of peds; few distinct very dark
gray (10YR 3/1) organic coatings on faces of
peds; 1 percent gravel; neutral; clear smooth
boundary.
BE—9 to 14 inches; brown (7.5YR 4/4) loam;
moderate fine and medium subangular blocky
structure; friable; common very fine and fine roots;
common prominent light gray (10YR 7/2 dry) clay
depletions on faces of peds; 1 percent gravel;
moderately acid; clear smooth boundary.
Bt1—14 to 19 inches; brown (7.5YR 4/4) clay loam;
moderate medium prismatic structure parting to
strong fine and medium subangular blocky; firm;
common very fine and fine roots; many distinct
brown (7.5YR 4/3) clay films on faces of peds; few
prominent light gray (10YR 7/2 dry) clay
depletions on faces of peds; very few distinct dark
brown (7.5YR 3/2) organo-clay films in root
channels and in pores; 2 percent gravel; strongly
acid; clear smooth boundary.
Bt2—19 to 31 inches; brown (7.5YR 4/4) clay loam;
moderate medium prismatic structure parting to
moderate medium subangular blocky; firm;
common very fine and fine roots; common distinct
brown (7.5YR 4/3) clay films on faces of peds;
very few distinct dark brown (7.5YR 3/2) organoclay
films in root channels and in pores; 2 percent
gravel; moderately acid; clear smooth boundary.