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

70 Soil Survey of
Typical Pedon for MLRA 95B
Typical pedon of Kidami silt loam, 2 to 4 percent
slopes, 1,500 feet north and 1,980 feet east of the
southwest corner of sec. 13, T. 44 N., R. 5 E.
A—0 to 3 inches; dark grayish brown (10YR 4/2) silt
loam, light brownish gray (10YR 6/2) dry; weak
fine subangular blocky structure parting to weak
fine granular; friable; common fine and medium
roots; 2 percent gravel; neutral; abrupt smooth
boundary.
E—3 to 7 inches; brown (10YR 5/3) silt loam; weak
thin platy structure parting to weak fine subangular
blocky; very friable; common fine roots; few
distinct very dark grayish brown (10YR 3/2)
organic coatings on faces of peds and in pores;
common distinct light gray (10YR 7/2 dry) clay
depletions on faces of peds and in pores; 1
percent gravel; slightly acid; abrupt smooth
boundary.
BE—7 to 10 inches; 50 percent brown (10YR 5/3) and
50 percent brown (7.5YR 5/4) silt loam; moderate
fine subangular blocky structure; friable; common
fine roots; few distinct very dark grayish brown
(10YR 3/2) organic coatings on faces of peds and
in pores; common distinct light gray (10YR 7/2
dry) clay depletions on faces of peds and in pores;
2 percent gravel; moderately acid; clear smooth
boundary.
2Bt1—10 to 16 inches; brown (7.5YR 5/4) loam;
moderate fine subangular blocky structure; firm;
common very fine and fine roots; few distinct
brown (7.5YR 4/4) clay films and light gray (10YR
7/2 dry) clay depletions on faces of peds and in
pores; 3 percent gravel; strongly acid; clear wavy
boundary.
2Bt2—16 to 24 inches; brown (7.5YR 4/4) clay loam;
moderate fine prismatic structure parting to
moderate fine subangular blocky; firm; common
very fine and fine roots; few distinct brown (7.5YR
4/3) clay films and light gray (10YR 7/2 dry) clay
depletions on faces of peds and in pores; 3
percent gravel; strongly acid; clear smooth
boundary.
2Bt3—24 to 30 inches; strong brown (7.5YR 4/6) clay
loam; moderate medium prismatic structure
parting to moderate fine and medium subangular
blocky; firm; few very fine roots; few distinct brown
(7.5YR 4/3 and 4/4) clay films on faces of peds
and in pores; 5 percent gravel; moderately acid;
clear wavy boundary.
2Bt4—30 to 37 inches; brown (7.5YR 4/4) clay loam;
moderate medium subangular blocky structure;
firm; few very fine and fine roots; few distinct
brown (7.5YR 4/3) clay films on faces of peds and
in pores; 6 percent gravel; slightly effervescent;
slightly alkaline; gradual wavy boundary.
2Bt5—37 to 45 inches; brown (7.5YR 5/4) loam; weak
medium and coarse subangular blocky structure;
firm; few very fine roots; few distinct brown (7.5YR
4/3) clay films on faces of peds and in pores; 7
percent gravel; slightly effervescent; slightly
alkaline; gradual wavy boundary.
2C—45 to 60 inches; brown (7.5YR 5/4) loam;
massive; firm; few very fine roots; few distinct
brown (7.5YR 4/3) clay films in root channels and
in pores; 8 percent gravel; strongly effervescent;
moderately alkaline.
MLRA Series Range in Characteristics
Thickness of silty material: Less than 18 inches
Depth to carbonates: 20 to 48 inches
Thickness of the solum: 24 to 55 inches
Ap or A horizon:
Hue—7.5YR or 10YR
Value—2 to 4 (4 to 6 dry)
Chroma—1 to 3
Texture—silt loam, loam, fine sandy loam, or clay
loam
E horizon (if it occurs):
Hue—7.5YR or 10YR
Value—4 or 5
Chroma—2 to 4
Texture—silt loam, loam, or sandy loam
2Bt horizon:
Hue—5YR, 7.5YR, or 10YR
Value—4 to 6
Chroma—3 to 6
Texture—clay loam or loam
2C horizon:
Hue—5YR, 7.5YR, or 10YR
Value—4 to 6
Chroma—3 to 6
Texture—loam or sandy loam
Content of gravel—less than 15 percent
527B—Kidami silt loam, 2 to 4 percent
slopes
Setting
Landform: Moraines and till plains
Position on the landform: Summits, shoulders, and
backslopes
Slope range: 2 to 4 percent