LOCATION RUSHVILLE IL+IA

Established Series
Rev. LJB-CLL-RJB
09/2021

RUSHVILLE SERIES

The Rushville series consists of very deep, poorly drained and very poorly drained, very slowly permeable soils formed in loess on till plains. Slope ranges from 0 to 2 percent. Mean annual temperature is about 11.1 degrees C (52 degrees F), and mean annual precipitation is about 940 mm (37 inches).

TAXONOMIC CLASS: Fine, smectitic, mesic Typic Albaqualfs

TYPICAL PEDON: Rushville silt loam - on a south-facing slope of less than 1 percent in a cultivated field. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 18 cm 90 to 7 inches); dark grayish brown (10YR 4/2) silt loam, light gray (10YR 7/2) dry; weak thin platy structure parting to moderate fine granular; friable; common fine roots; common patchy prominent irregular gray (10YR 6/1) clay depletions on faces of peds; few fine prominent irregular black (2.5Y 2/1) masses of iron-manganese throughout; neutral; clear smooth boundary. [13 to 18 cm (5 to 7 inches) thick]

Eg--18 to 33 cm (7 to 13 inches); grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; moderate medium subangular blocky structure parting to weak thick platy; friable; common fine roots throughout; common fine constricted tubular pores; many continuous prominent gray (10YR 6/1) clay depletions throughout; common fine distinct irregular yellowish brown (10YR 5/4) masses of iron throughout; many fine prominent irregular black (2.5Y 2/1) iron-manganese throughout; neutral; clear smooth boundary. [10 to 31 cm (4 to 12 inches) thick]

Btg1--33 to 53 cm (13 to 21 inches); light brownish gray (10YR 6/2) silty clay; moderate medium prismatic structure parting to moderate fine subangular blocky; friable; common fine and medium roots throughout; common fine and medium continuous tubular pores; many continuous distinct grayish brown (10YR 5/2) clay films on faces of peds; common fine distinct irregular yellowish brown (10YR 5/6) masses of oxidized iron throughout; few fine prominent rounded black (2.5Y 2/1) iron-manganese concretions throughout; strongly acid; clear wavy boundary.

Btg2--53 to 66 cm (21 to 26 inches); light brownish gray (10YR 6/2) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; few fine roots throughout; few fine continuous tubular pores; many continuous distinct grayish brown (10YR 5/2) clay films on faces of peds; common fine distinct irregular yellowish brown (10YR 5/8) masses of oxidized iron throughout; few fine prominent irregular black (2.5Y 2/1) masses of iron-manganese throughout; few fine prominent rounded black (2.5Y 2/1) iron-manganese concretions throughout; moderately acid; clear wavy boundary.

Btg3--66 to 81 cm (26 to 32 inches); light brownish gray (10YR 6/2) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; few fine roots throughout; few fine continuous tubular pores; many discontinuous distinct grayish brown (10YR 5/2) clay films on faces of peds; many discontinuous prominent gray (10YR 6/1) silt coats on vertical faces of peds; few fine prominent irregular black (2.5Y 2/1) masses of iron-manganese throughout; many fine distinct irregular yellowish brown (10YR 5/8) masses of oxidized iron throughout; moderately acid; clear wavy boundary.

Btg4--81 to 109 cm (32 to 43 inches); light brownish gray (10YR 6/2) silty clay loam; moderate coarse prismatic structure parting to moderate medium and coarse subangular blocky; firm; few continuous distinct grayish brown (10YR 5/2) clay films lining root channels and/or pores; common medium prominent irregular yellowish brown (10YR 5/8) masses of iron throughout; common fine prominent irregular brownish yellow (10YR 6/8) masses of oxidized iron throughout; moderately acid; clear wavy boundary.

Btg5--109 to 127 cm (43 to 50 inches); light brownish gray (10YR 6/2) silty clay loam; weak coarse prismatic structure; firm; few continuous distinct grayish brown (10YR 5/2) clay films lining root channels and/or pores; common medium prominent irregular yellowish brown (10YR 5/8) masses of iron throughout; moderately acid; clear wavy boundary. [The combined thickness of the Btg horizons is 46 to 127 cm (18 to 50 inches).]

Cg1--127 to 188 cm (50 to 74 inches); light brownish gray (10YR 6/2) silt loam; massive; firm; few discontinuous distinct dark grayish brown (10YR 4/2) clay films lining root channels and/or pores; many medium and coarse prominent irregular strong brown (7.5YR 5/8) masses of oxidized iron throughout and common medium distinct irregular yellowish brown (10YR 5/4) masses of oxidized iron throughout; slightly acid; clear wavy boundary.

Cg2--188 to 216 cm (74 to 85 inches); light brownish gray (10YR 6/2) silt loam; massive; firm; few discontinuous distinct dark grayish brown (10YR 4/2) clay films lining root channels and/or pores; many coarse prominent irregular strong brown (7.5YR 5/8) masses of oxidized iron throughout; neutral; clear wavy boundary.

TYPE LOCATION: Adams County, Illinois; about 6 miles south of Camp Point; 2150 feet east and 250 feet south of the northwest corner of sec. 23, T. 1 S., R. 6 W.; USGS Liberty, IL topographic quadrangle; Latitude 39 degrees 58 minutes 28.7 seconds N., and Longitude 91 degrees 3 minutes 36.8 seconds W., NAD 27.

RANGE IN CHARACTERISTICS:
Depth to the base of the argillic horizon: 102 to 152 cm (40 to 60 inches)
Average content of clay in the partice-size control section: between 35 and 45 percent, maximum clay content in any subhorizon is 48 percent.
Average content of sand in the particle-size control section: less than 5 percent
Depth to carbonates: greater than 127 cm (50 inches)

Ap or A horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 1 or 2
Texture: silt loam
Reaction: very strongly acid to neutral
Other features: Undisturbed pedons have a thin A horizon with hue of 10YR, value of 2 to 4, and chroma of 1 or 2.

Eg and/or BE horizons:
Hue: 10YR
Value: 5 or 6
Chroma: 1 or 2
Texture: silt loam or silt
Reaction: very strongly acid to moderately acid when not limed. Pedons that have been limed range to neutral.

Some pedons have a B/E horizon less than 8 cm (3 inches) in thickness immediately below the E horizon.

Btg and/or BCg horizons:
Hue: 10YR, 2.5Y or 5Y
Value: 4 to 6
Chroma: 1 or 2
Texture: Btg horizon is silty clay loam or silty clay. BCg horizon (where present) is silty clay loam or silt loam.
Redoxmorphic features:
Hue: 10YR, 2.5Y, 5Y or 7.5YR
Value: 4 to 6
Chroma: 1 to 8
Clay films have value of 3 to 5, and chroma of 0 to 2.
Reaction: very strongly acid to slightly alkaline

Cg horizon:
Hue: 10YR, 2.5Y or 5Y
Value: 4 to 6
Chroma: 1 or 2
Texture: commonly silt loam, but the range includes silty clay loam
Content of clay: 20 to 30 percent
Redoxmorphic features:
Hue: 10YR, 2.5Y, 5Y or 7.5YR
Value: 4 to 6
Chroma; 1 to 8
Reaction: moderately acid to moderately alkaline

COMPETING SERIES: These are the Ames, Leaksville, Pierron, Watchung, Wynoose, and Zwingle series. Ames and Wynoose soils average more than 5 percent sand in the lower part of the series control section. Leaksville soils formed in residuumweathered from Triassic dhale rocks. Pierron soils have a mean annual soil temperature of more than 13.3 degrees C (56 degrees F). Watchung soils formed in residuum and are less than 102 cm (40 inches) to the base of the argillic horizon. Zwingle soils average more than 45 percent clay in the particle size control section.

GEOGRAPHIC SETTING: Rushville soils are on nearly level summits or depressions on till plains. Slope gradients typically are less than 1 percent, and range from 0 to 2 percent. These soils formed in more than 152 cm (60 inches) of loess. Mean annual air temperature ranges from 7.8 to 12.2 dwgrees C (46 to 54 degrees F), mean annual soil temperature ranges from 48 to 56 degrees F., and mean annual precipitation ranges from 737 to 1143 mm (29 to 45 inches), frost free days ranges from 160 to 190 days, and elevation ranges from 104 to 311 meters (340 to 1020 feet) above mean sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clarksdale, Clinton, Keomah, and Marine soils. The somewhat poorly drained Marine, Clarksdale, and Keomah soils are on slightly higher and slightly more convex parts of the summits. The moderately well drained Clinton soils are dominantly browner in the lower one-half of the series control section, do not have abrupt textural change in the upper lower one-third of the control section, and are on the crests and side slopes of summits above Rushville soils or on side slopes of drainageways below them.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained or very poorly drained. The potential for surface water runoff is low or negligible. Saturated hydraulic conductivity is low to moderately low (0.02 to 0.42 micrometers per second). Permeability is very slow. The seasonal high water table is above the surface to 46 cm (1.5 feet) below the surface in spring in normal years.

USE AND VEGETATION: Most areas are cultivated. Corn, soybeans, small grain, and meadow are the principal crops. Native vegetation is mixed hardwood forest. See Additional Data section for native vegetative cover in Iowa.

DISTRIBUTION AND EXTENT: West central Illinois and southeastern Iowa in MLRA 108A, 108B, 108C, 109, 114B, 115B, and 115C. Rushville soils are of small extent; about 7,500 acres have been correlated to date.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana

SERIES ESTABLISHED: Schuyler County, Illinois, 1930.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon - the zone from the surfaces of the soil to a depth of approximately 33 cm (13 inches) (Ap and Eg horizons);
albic horizon - the zone from approximately 18 to 33 cm (7 to 13 inches) (Eg horizon);
abrupt textural change feature - from the E horizon to the Btg1 horizon;
argillic horizon - the zone from approximately 33 to 127 cm (13 to 50 inches) (Btg1, Btg2, Btg3, Btg4 and Btg5 horizons);
aquic moisture regime.

ADDITIONAL DATA: Engineering test data for the typical pedon are published in the Soil Survey of Adams County, Illinois. University of Illinois soils lab data for 10 pedons are on file at the state office.

In Iowa, the native vegetative cover is a mixed herbaceous and woody community commonly inhabited with Green Ashes, American Elms, Common Hackberries, Eastern Cottonwoods, American Sycamores, Silky Dogwoods, Black Willows, Wild Black Currants, Riverbank Grapes, Grays Sedges, Hop Sedges, Virginia Wildryes, Stiff Bedstraws, White Avens, Wood Nettles, False Nettles, Canadian Clearweeds, and Common Bonesets. Source: Iowa State Office, Natural Resources Conservation Service, Des Moines, IA.

National Cooperative Soil Survey
U.S.A.