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

82 Soil Survey of
violently effervescent; moderately alkaline; gradual
smooth boundary.
Oa2—11 to 27 inches; sapric material, 50 percent
black (N 2.5/0) and 50 percent black (10YR 2/1)
broken face and rubbed; about 20 percent fiber,
less than 2 percent rubbed; weak medium
subangular blocky structure; friable; common very
fine roots; 1 percent fine snail-shell fragments;
slightly effervescent; slightly alkaline; gradual
smooth boundary.
Oa3—27 to 60 inches; sapric material, black (N 2.5/0)
broken face and rubbed; about 5 percent fiber,
less than 1 percent rubbed; massive; very friable;
common very fine roots; 1 percent fine snail-shell
fragments; slightly effervescent; slightly alkaline.
MLRA Series Range in Characteristics
Thickness of organic deposits: Greater than 51 inches
Depth to carbonates: Less than 10 inches
Surface tier:
Hue—10YR or N
Value—2 or 3
Chroma—0 or 1
Subsurface tier:
Hue—7.5YR, 10YR, or N
Value—2 or 3
Chroma—0 to 2
210A—Lena muck, 0 to 2 percent slopes
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
Lena and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have organic deposits less than 51 inches
thick
• soils that do not contain carbonates at or near the
surface
• soils in which the surface layer has a lower content
of organic matter
Dissimilar soils:
• the poorly drained Harpster, Hooppole, Kish, Pella,
Selmass, and Will 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
1210A—Lena 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
Lena and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that have organic deposits less than 51 inches
thick
• soils that do not contain carbonates at or near the
surface
• soils in which the surface layer has a lower content
of organic matter
Dissimilar soils:
• the poorly drained Harpster, Hooppole, Kish, Pella,
Selmass, and Will 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: