LOCATION WYMORE             NE+KS

WYMORE SERIES

TAXONOMIC CLASS: Fine, smectitic, mesic Aquertic Argiudolls

TYPICAL PEDON: Wymore silty clay loam - on a 4 percent convex southwest-facing slope in a cultivated field. When described the soil was moist throughout. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 13 centimeters; very dark brown (10YR 2/2) silty clay loam, dark gray (10YR 4/1) dry; weak medium granular structure; slightly hard; friable; moderately acid; abrupt smooth boundary. (10 to 25 centimeters thick)

BA--13 to 23 centimeters; very dark brown (10YR 2/2) silty clay, very dark grayish brown (10YR 3/2) dry; moderate very fine blocky structure; hard, firm; thin continuous clay films on faces of peds; moderately acid; clear smooth boundary. (0 to 13 centimeters thick)

Bt1--23 to 43 centimeters; very dark grayish brown (10YR 3/2) silty clay, dark grayish brown (10YR 4/2) dry; moderate medium and fine blocky structure; hard, firm; thin continuous clay films on faces of peds; moderately acid; clear smooth boundary.

Bt2--43 to 64 centimeters; dark grayish brown (10YR 4/2) silty clay, dark yellowish brown (10YR 4/4) dry; moderate medium and fine blocky structure; hard, firm; thin continuous clay films on faces of peds; few fine distinct reddish brown (5YR 5/4) and dark yellowish brown (10YR 4/4) iron masses; slightly acid; gradual smooth boundary.

Bt3--64 to 81 centimeters; grayish brown (2.5Y 5/2) silty clay, brown (10YR 5/3) dry; moderate medium blocky structure; hard, firm; thin continuous clay films on faces of peds; common fine distinct dark yellowish brown (10YR 4/4) iron masses; slightly acid; clear smooth boundary. (Combined thickness of Bt horizon is 58 to 99 centimeters thick.)

BC--81 to 102 centimeters; mixed olive brown (2.5Y 4/4) and grayish brown (2.5Y 5/2) silty clay loam; grayish brown (2.5Y 5/2) and light brownish gray (2.5Y 6/2) dry; moderate medium and fine blocky structure; slightly hard, friable; thin discontinuous clay films on faces of peds; common fine reddish brown (5YR 4/4) iron-manganese concretions; few fine distinct yellowish brown (10YR 5/4) iron masses; neutral; clear smooth boundary. (20 to 30 centimeters thick)

C--102 to 135 centimeters; gray (5Y 5/1) silty clay loam, light brownish gray (2.5Y 6/2) dry; weak medium and coarse blocky structure; slightly hard, friable; few fine pipe-like iron concretions; few carbonate concretions; neutral; abrupt smooth lower boundary. (18 to 36 centimeters thick)

Ab--135 to 160 centimeters; brown (7.5YR 4/2) silty clay loam, brown (10YR 5/3) dry; weak fine platy structure; soft, very friable; neutral.

TYPE LOCATION: Pawnee County, Nebraska; about 1.6 kilometers east and
1.6 kilometers south of Pawnee City; 357 meters west, 177
meters south of northeast corner, sec. l, T. 1 N., R. 11 E. USGS Pawnee City topographic quadrangle; lat. 40 degrees, 5 minutes, 9.1 seconds N. and long. 96 degrees, 7 minutes, 40.2 seconds W., NAD83.

RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is wet March to April
Moisture regime: udic
Mean annual soil temperature: 10 to 15 degrees C.
Depth to argillic horizon: 10 to 38 centimeters.
Depth to secondary calcium carbonate, in some pedons: 76 to 127 centimeters.
Depth to redox concentrations: 30 to 61 centimeters.
Depth to episaturation: 30 to 91 centimeters from March to April.
Depth to pedisediment: 102 to more than 203 centimeters.
Depth to glacial till: 152 to more than 203 centimeters.
Thickness of the mollic epipedon: 25 to 61 centimeters.
Thickness of the solum: 84 to 203 centimeters.
Vertic features: The presence of linear extensibility of 6.0 cm or more at 10 to
99 centimeters.
Particle-size control section (weighted average):
Clay content: 42 to 55 percent
Sand content: 0 to 5 percent
Redox features, iron masses and iron and manganese concretions:
Hues: 5YR, 7.5YR, or 10YR
Values: 2 to 5
Chromas: 1 to 8, lower part particle size control section and underlying layers

A horizon:
Hue: 10YR
Value: 2 or 3, 3 or 4 dry
Chroma: 1 or 2
Texture: Silty clay loam or silty clay
Clay content: 27 to 50 percent
Reaction: Moderately acid or slightly acid

Bt horizon:
Hue: 10YR or 2.5Y
Value: 3 to 5, 4 to 6 dry
Chroma: 2 to 4
Texture: Silty clay
Clay content: 42 to 55 percent
Reaction: Moderately acid to neutral
Redoximorphic features: not evident or masked by the matrix color in the lower
part of some Bt horizons

C horizon:
Hue: 2.5Y or 5Y
Value: 5 or 6, 6 or 7 dry
Chroma: 1 or 2
Texture: Silty clay loam
Clay content: 27 to 40 percent
Reaction: Neutral or slightly alkaline

COMPETING SERIES: These are the Arisburg, Arispe, Chase, Good Thunder, Grundy,
Lagonda, Lamoni, Martin, Mahaska, Mayberry, Seymore, Shorewood, and Tina series.
Arisburg, Arispe and Mahaska soils average 35 to 42 percent clay in the particle
size control section.
Chase and Martin soils have a mollic epipedon more than 51 centimeters thick.
Grundy and Seymore soils are moist in the soil moisture control section for
longer periods during the growing season.
Good Thunder soils formed in lacustrine sediments on glacial lake plains.
Mayberry soils contain more than 5 percent sand throughout the particle size
control section and have hue redder than 10YR in the argillic horizon.
Lagonda soils contain more than 5 percent sand in the lower part of the series
control section.
Lamoni and Tina soils are moderately acid in the lower part of the argillic
horizon.
Shorewood soils typically have carbonates at depths of 71 to 127 centimeters.

GEOGRAPHIC SETTING:
Parent material: Loess
Landform: Uplands
Slopes: 0 to 12 percent
Mean annual temperature: 10 to 15 degrees C.
Mean annual precipitation: 78 to 91 centimeters.
Frost-free period: 160 to 170 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aksarben, Sharpsburg, Shelby and
Yutan soils.
Aksarben, Sharpsburg and Shelby soils contain less clay in the Bt horizon.
Shelby soils formed in glacial till.
Aksarben and Sharpsburg soils occur on upper side slopes and narrow ridges and
are higher on the landscape.
Shelby and Pawnee soils are lower than Wymore soils on the landscape.
Yutan soils do not have a mollic epipedon, contain less clay in the Bt horizon
and are well drained.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: moderately well drained
Runoff: low or medium
Saturated hydraulic conductivity: low
Seasonal high water saturation zone: 30 to 91 centimeters in the
spring.

USE AND VEGETATION: Most areas of Wymore soils are cultivated.
Wheat, corn, soybeans and sorghum are the principal crops.
Native vegetation is mostly tall and some mid grasses.

DISTRIBUTION AND EXTENT: Wymore soils are extensive in southeastern Nebraska and
adjacent parts of Kansas. The acreage is of large extent.

MLRA OFFICE RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Pawnee County, Nebraska, 1961.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 23 to 73 centimeters (Bt
horizons).
Mollic epipedon: 0 to 43 centimeters (Ap, BA and Bt1 horizons).
Argillic horizon: 23 to 81 centimeters (Bt1, Bt2 and Bt3
horizons).
Redoximorphic concentrations: 43 to 135 centimeters (Bt2, Bt3, BC
and C horizons).
Vertic features: The presence of linear extensibility of 6.0 cm or more at 23 to
73 centimeters.
Episaturation: 30 to 91 centimeters from March to April.

Lrr=m
5/00 added from the Soil Interpretation Record clay content and sand content to
"Range in Characteristics" and Frost Free period to "Geographic Setting". Added
words, slightly alkaline, to reaction class of C horizon based on NSSL data.

Modified format by LRM in 2/2006 to include metric conversion and change
permeability to saturated hydraulic conductivity.

ADDITIONAL DATA: The Wymore pedon described in Soil Survey Investigations Report
No. 5, pg. 232 and 233, is the same as the typical pedon described here. Other
pedons are on pg. 226 to 231 or at this site:
http://ssldata.sc.egov.usda.gov/rptExecute.asp?p=2289&r=1&submit1=Get+Report

Wymore was modified 12/12/2003 to remove slopes greater than 9 percent and to
clarify depths to pedisediment and glacial till.