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

McHenry County, Illinois—Part I 73
• “Agronomy” section
• “Forestland” section
• “Wildlife Habitat” section
• “Engineering” section
• “Soil Properties” section
527D3—Kidami clay loam, 6 to 12 percent
slopes, severely eroded
Setting
Landform: Moraines and till plains
Position on the landform: Backslopes
Slope range: 6 to 12 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
Kidami and similar soils: 85 percent
Dissimilar soils: 15 percent
Similar soils:
• soils that are moderately eroded
• soils that have slopes of less than 6 percent or
more than 12 percent
• soils that have carbonates at a depth of less than
20 inches
• soils that have a seasonal high water table at a
depth of more than 3.5 feet
Dissimilar soils:
• calcareous soils in positions on the landform similar
to those of the Kidami soil
• the somewhat poorly drained Herbert and Lisbon
soils in the lower positions on the landform
• the poorly drained Pella soils in 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
Kidder Series
Drainage class: Well drained
Permeability: Moderate in the upper part and
moderately rapid in the lower part
Landform: Moraines
Parent material: Loamy till
Slope range: 2 to 30 percent
Taxonomic classification: Fine-loamy, mixed, mesic
Typic Hapludalfs
Typical Pedon for MLRA 95B
Typical pedon of Kidder silt loam, 2 to 6 percent
slopes, 2,500 feet south and 185 feet west of the
northeast corner of sec. 1, T. 4 N., R. 13 E.
Ap—0 to 7 inches; very dark grayish brown (10YR
3/2) silt loam, light brownish gray (10YR 6/2) dry;
moderate fine and very fine subangular blocky
structure; friable; common fine roots; common fine
and medium, continuous, mostly exped dendritic
pores; neutral; abrupt smooth boundary.
BE—7 to 11 inches; 60 percent brown (10YR 4/3)
and 40 percent brown (7.5YR 4/4) loam; weak
fine and medium subangular blocky structure;
friable; common fine roots; common very fine
and fine and few medium, continuous, mostly
exped dendritic pores; neutral; clear smooth
boundary.
Bt1—11 to 17 inches; brown (7.5YR 4/4) clay loam;
moderate fine and medium subangular blocky
structure; firm; few fine roots; common fine and
very fine and few medium, continuous, mostly
exped dendritic pores; few faint brown (7.5YR 4/3)
clay films on faces of peds and in pores and clay
bridging of sand grains; neutral; clear wavy
boundary.
Bt2—17 to 28 inches; brown (7.5YR 4/4) sandy clay
loam; moderate medium subangular blocky
structure; firm; few fine roots; common fine and
very fine, continuous, mostly exped dendritic
pores; few faint brown (7.5YR 4/3) clay films on
faces of peds and in pores and clay bridging of
sand grains; neutral; clear wavy boundary.
Bt3—28 to 30 inches; dark yellowish brown (10YR
3/4) sandy loam; weak medium subangular blocky
structure; friable; few fine and very fine,
continuous, obliquely oriented, inped and exped
pores; very few faint dark brown (10YR 3/3) clay
films on faces of some peds and clay bridging of
sand grains; 14 percent gravel; slightly alkaline;
clear wavy boundary.
C—30 to 60 inches; brown (10YR 5/3) gravelly sandy
loam; massive; friable; few fine and very fine
continuous, obliquely oriented pores; 34 percent
gravel; strongly effervescent; slightly alkaline.
MLRA Series Range in Characteristics
Depth to carbonates: 16 to 32 inches
Thickness of the solum: 20 to 40 inches