LOCATION WESTBORO OH

Established Series
Rev. TEL-SJH-MHD-MWV
11/2021

WESTBORO SERIES

The Westboro series consists of very deep, somewhat poorly drained soils formed in loess and the underlying till. These soils are on till plains. Slope ranges from 0 to 4 percent. Mean annual precipitation is about 889 mm (35 inches), and mean annual air temperature is about 11 degrees C (52 degrees F).

TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Fragiaquic Glossudalfs

TYPICAL PEDON: Westboro silt loam, on a level slope in a meadow at an elevation of 291 meters (956 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 28 cm (0 to 11 inches); grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; weak fine and medium subangular blocky structure; friable; common fine roots; common fine prominent reddish brown (5YR 4/4) masses of oxidized iron throughout; common fine distinct black (10YR 2/1) manganese masses throughout; strongly acid; abrupt smooth boundary. [15 to 30 cm (6 to 12 inches) thick]

Bt--28 to 41 cm (11 to 16 inches); yellowish brown (10YR 5/4) silt loam; moderate fine and medium subangular blocky structure; firm; moderately few fine roots; few distinct gray (10YR 5/1) clay films on faces of peds; few prominent light brownish gray (10YR 6/2) clay depletions on faces of peds; common medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine distinct strong brown (7.5YR 5/6) masses of oxidized iron on faces of peds; very strongly acid; clear wavy boundary. [13 to 25 cm (5 to 10 inches) thick]

Bt/E--41 to 58 cm (16 to 23 inches); 65 percent yellowish brown (10YR 5/4) silty clay loam (Bt part) and 35 percent light brownish gray (2.5Y 6/2) silt loam (E part); weak medium prismatic structure parting to moderate medium subangular blocky; firm; moderately few fine roots; common distinct gray (10YR 5/1) clay films on faces of peds; common medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine distinct strong brown (7.5YR 5/6) masses of oxidized iron on faces of peds; common fine distinct black (10YR 2/1) manganese masses throughout; E material completely surrounds Bt part; tongues of E material 5 to 15 cm (2 to 6 inches) wide extend through the horizon; very strongly acid; gradual wavy boundary. [10 to 18 cm (4 to 7 inches) thick]

Btx1--58 to 91 cm (23 to 36 inches); yellowish brown (10YR 5/6) silty clay loam with pockets of loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; few fine roots; common prominent gray (10YR 5/1) clay films on faces of peds; few prominent light brownish gray (2.5Y 6/2) clay depletions in the upper 8 cm (3 inches); common medium prominent grayish brown (10YR 5/2) iron depletions on vertical faces of peds; common medium faint strong brown (7.5YR 5/6) and common fine faint strong brown (7.5YR 4/6) masses of oxidized iron throughout; common medium prominent black (10YR 2/1) manganese masses throughout; 25 percent of volume is brittle; strongly acid; gradual wavy boundary.

2Btx2--91 to 124 cm (36 to 49 inches); yellowish brown (10YR 5/6) loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm, few fine roots; common prominent gray (10YR 5/1) and common faint yellowish brown (10YR 5/6) clay films on faces of peds; common medium prominent grayish brown (10YR 5/2) iron depletions on vertical faces of peds; common fine faint strong brown (7.5YR 5/6) and common fine faint strong brown (7.5YR 4/6) masses of oxidized iron throughout; common medium prominent black (10YR 2/1) manganese masses throughout; 2 percent igneous rock fragments; 30 percent of volume is brittle; strongly acid; clear wavy boundary. [Combined thickness of the Btx and 2Btx horizons is 20 to 76 cm (8 to 30 inches).]

2Bt1--124 to 150 cm (49 to 59 inches); dark yellowish brown (10YR 4/4) loam; weak medium prismatic structure parting to moderate medium subangular blocky; firm; few fine roots; common prominent gray (10YR 5/1) and common faint yellowish brown (10YR 5/6) clay films on faces of peds; common medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine distinct strong brown (7.5YR 5/6) masses of oxidized iron on faces of peds; common medium distinct black (10YR 2/1) manganese masses throughout; 4 percent igneous rock fragments; moderately acid; clear wavy boundary.

2Bt2--150 to 173 cm (59 to 68 inches); dark yellowish brown (10YR 4/4) loam; weak medium prismatic structure parting to moderate medium subangular blocky; firm; common prominent gray (10YR 5/1) and common faint dark yellowish brown (10YR 4/4) clay films on faces of peds; common medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine distinct strong brown (7.5YR 5/6) masses of oxidized iron on faces of peds; common medium distinct black (10YR 2/1) manganese masses on faces of peds; 5 percent igneous rock fragments; slightly acid; clear wavy boundary.

2Bt3--173 to 191 cm (68 to 75 inches); yellowish brown (10YR 5/4) clay loam; weak fine prismatic structure parting to moderate medium subangular blocky; firm; common distinct gray (10YR 5/1) clay films and few faint dark yellowish brown (10YR 4/4) clay films on faces of peds; common medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine distinct yellowish brown (10YR 5/6) masses of oxidized iron; common medium distinct black (10YR 2/1) manganese masses on faces of peds; 5 percent igneous rock fragments; neutral; clear wavy boundary.

2Bt4--191 to 203 cm (75 to 80 inches); yellowish brown (10YR 5/4) clay loam; moderate medium subangular blocky structure; firm; common distinct gray (10YR 5/1) clay films on faces of peds; many medium distinct grayish brown (10YR 5/2) iron depletions on faces of peds; common fine prominent strong brown (7.5YR 5/8) masses of oxidized iron on faces of peds; common fine and medium distinct black (10YR 2/1) manganese masses on faces of peds; 5 percent igneous rock fragments; neutral. [Combined thickness of the 2Bt horizon is 114 to 152 cm (45 to 60 inches).]

TYPE LOCATION: Brown County, Ohio: about 1.25 miles southeast of Fayetteville, in Perry Township; about 1600 meters (5,250 feet) east northeast of the junction of US 50 and US 68 along US 50, then about 1650 meters (5,415 feet) south; USGS Fayette topographic quadrangle; lat. 39 degrees 10 minutes 26.50 seconds N. and long. 83 degrees 54 minutes 57.80 seconds W., NAD 83.

RANGE IN CHARACTERISTICS:
Depth to the base of the argillic horizon: greater than 203 cm (80 inches)
Depth to carbonates: 152 to 203 cm (60 to 80 inches)
Depth to horizon with fragic soil properties: 50 to 91 cm (20 to 36 inches)
Thickness of the loess: 51 to 102 cm (20 to 40 inches)
Rock fragments: igneous gravel

Ap horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 2 or 3
Texture: silt loam
Rock fragment content: 0 to 1 percent
Reaction: moderately acid to neutral

BE horizon (where present):
Hue: 10YR
Value: 4 or 5
Chroma: 2 to 4
Texture: silt loam
Rock fragment content: 0 to 1 percent
Reaction: very strongly acid to neutral

Bt horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 4 to 6
Texture: silty clay loam or silt loam
Rock fragment content: 0 to 2 percent
Reaction: very strongly acid to moderately acid

E/Bt or Bt/E horizon:
Hue: 10YR or 2.5Y (E part); 10YR (Bt part)
Value: 5 or 6
Chroma: 2 or 3 (E part); 4 to 6 (Bt part)
Texture: silt loam (E part); silty clay loam or silt loam (Bt part)
Rock fragment content: 0 to 2 percent
Reaction: very strongly acid to moderately acid

Btx, Btgx, 2Btx, or 2Btgx horizon:
Hue: 7.5YR, 10YR, or 2.5Y
Value: 4 to 6
Chroma: 1 to 8
Texture: silty clay loam, clay loam, or loam
Clay content: 24 to 35 percent
Silt content: 35 to 55 percent
Rock fragment content: 0 to 10 percent
Reaction: very strongly acid to slightly acid

B't horizon (where present), 2Bt or 2Btg horizon:
Hue: 7.5YR, 10YR, or 2.5Y
Value: 4 to 6
Chroma: 1 to 8
Texture: silty clay loam, clay loam, or loam
Clay content: 24 to 35 percent
Silt content: 35 to 55 percent
Rock fragment content: 2 to 10 percent
Reaction: moderately acid to slightly alkaline

COMPETING SERIES: There are no other series in this family. Soils in a closely related family include the Schaffer series. Schaffer soils have a fragipan and classify Aquic Fraglossudalfs.

GEOGRAPHIC SETTING: Westboro soils are on flats and knolls on loess-covered till plains of Illinoian age. Slope ranges from 0 to 4 percent. The soils formed in 51 to 102 cm (20 to 40 inches) of loess and the underlying till. Mean annual precipitation ranges from 940 to 1170 mm (37 to 46 inches). Mean annual air temperature ranges from 9 to 14 degrees C (48 to 57 degrees F). Frost-free period is 155 to 225 days. Elevation is 271 to 311 meters (890 to 1020 feet) above mean sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clermont, Jonesboro, Rossmoyne, Schaffer, and Secondcreek soils. The poorly drained Clermont soils are on lower lying flats. The moderately well drained Jonesboro and Rossmoyne soils are on swells or knolls. The Schaffer soils have a fragipan and are on similar landscapes. The very poorly drained Secondcreek soils are in depressions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. The depth to the top of an intermittent perched high water table ranges from 15 to 46 cm (0.5 to 1.5 feet) between January and May in normal years. The potential for surface runoff is low. Saturated hydraulic conductivity is moderately high. Permeability is moderate in the loess and moderately slow in the till.

USE AND VEGETATION: Westboro soils are cultivated. Principal crops are corn, wheat, soybeans, grasses and legumes, and tobacco.

DISTRIBUTION AND EXTENT: Southwestern Ohio; MLRA 114A. The series is of moderate extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: AMHERST, MASSACHUSETTS

SERIES ESTABLISHED: Brown County, Ohio, 1999.

REMARKS: Westboro soils were previously mapped as Avonburg soils in Ohio.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from the surface to a depth of 28 cm (11 inches) (Ap horizon).
Argillic horizon: from a depth of 28 to more than 203 cm (11 to 80 inches) (Bt, Bt part of Bt/E, Btx, 2Btx, 2Bt horizons).
Glossic horizon: from a depth of 41 to 58 cm (16 to 23 inches) (Bt/E horizon).
Fragic soil properties: from 58 to 124 cm (20 to 49 inches) (Btx, 2Btx horizons).
Aquic conditions: redox features immediately below Ap horizon to a depth of over 203 cm (80 inches).

ADDITIONAL DATA: Characterization data is available for the typical pedon, Pedon ID S07OH015-001, from the Kellogg Soil Survey Laboratory, Lincoln, NE. Additional data is availalble for pedon BN-20 from The Ohio State University Soil Characterization Laboratory.

National Cooperative Soil Survey
U.S.A.