LOCATION BARDEN MO

Established Series
Rev. ACP-PRF-RGC
09/2017

BARDEN SERIES

The Barden series consists of very deep, moderately well drained soils that formed in a mantle of loess or other silty material and residuum from shale of Pennsylvanian age. These soils are on ridges and upland side slopes. Slope ranges from 0 to 5 percent. Mean annual precipitation is about 1020 mm (40 inches), and mean annual temperature is about 16 degrees C (60 degrees F).

TAXONOMIC CLASS: Fine, mixed, active, thermic Aquollic Hapludalfs

TYPICAL PEDON: Barden silt loam on a 2 percent slope in grassland at an elevation of 295 meters (970 feet). (Colors are for moist soil unless otherwise stated.)

A--0 to 28 cm (0 to 11 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; strong very fine and fine granular structure; very friable; many fine roots; common worm channels and casts; few fine iron-manganese concretions; strongly acid; gradual smooth boundary. [18 to 38 cm (7 to 15 inches) thick]

BE--28 to 46 cm (11 to 18 inches); brown (10YR 4/3) silty clay loam; weak very fine subangular blocky structure; friable; common fine roots; many worm channels; few organic stains; few fine iron-manganese concretions; very strongly acid; gradual smooth boundary. [0 to 20 cm (0 to 8 inches) thick]

2Bt1--46 to 58 cm (18 to 23 inches); yellowish brown (10YR 5/4) silty clay; moderate very fine subangular and angular blocky structure; firm; few fine roots; many faint clay films on faces of peds; few worm casts; many fine prominent red (2.5YR 4/8) masses of oxidized iron and a few faint brown (10YR 5/3) iron-manganese masses; common fine iron-manganese concretions; strongly acid; gradual smooth boundary.

2Bt2--58 to 76 cm (23 to 30 inches); mottled yellowish brown (10YR 5/8), dark grayish brown (10YR 4/2), and red (2.5YR 4/8) silty clay; moderate fine and very fine subangular and angular blocky structure; firm; few fine roots; many distinct clay films on faces of peds; few worm casts; common fine iron-manganese concretions; strongly acid; gradual smooth boundary.

2Bt3--76 to 142 cm (30 to 56 inches); mottled strong brown (7.5YR 5/6), yellowish brown (10YR 5/6), gray (10YR 5/1), and light brownish gray (10YR 6/2) silty clay loam; weak fine and very fine subangular blocky structure; firm; few faint clay films on faces of peds; common medium iron-manganese concretions increasing in amount in the lower 38 cm (15 inches); strongly acid; gradual smooth boundary. [Combined thickness of the 2Bt horizon is 76 to 137 cm (30 to 54 inches).]

2C--142 to 200 cm (56 to 80 inches); yellowish brown (10YR 5/8) silty clay loam; massive; friable; few fine prominent pale brown (10YR 6/3) silt coats; few fine prominent light gray (10YR 7/2) masses of reduced iron; many medium and coarse iron-manganese concretions; strongly acid.

TYPE LOCATION: Barton County, Missouri; about 11 miles west and 2 miles south of Lamar; 2,275 feet west and 520 feet north of the southeast corner of sec. 6, T. 31 N., R. 32 W.; USGS Nashville topographic quadrangle; lat. 37.4631139 degrees and long. -94.4936889 degrees, WGS84.

RANGE IN CHARACTERISTICS:

Depth to argillic horizon: 18 to 58 cm (7 to 23 inches)
Depth to redox concentrations: 46 to 61 cm (18 to 24 inches)
Depth to redox depletions: 76 to 91 cm (30 to 36 inches)
Depth to endosaturation: 61 to 91 cm (24 to 36 inches) from November to March
Base Saturation: less than 50 percent in some part of the argillic horizon.

Particle-size control section (weighted average): 35 to 60 percent clay

A horizon:
Hue: 10YR
Value: 2 or 3, 4 or 5 dry
Chroma: 1 to 3
Texture: silt loam, loam, silty clay loam
Base saturation: 65 to 100 percent
Reaction: strongly acid to neutral

BE horizon:
Hue: 10YR
Value: 3 or 4
Chroma: 2 to 4
Other colors: may have mottles of higher chroma
Texture: silt loam, loam, silty clay loam
Clay content: 15 to 30 percent
Base saturation: 40 to 55 percent
Reaction: very strongly acid to neutral

Bt horizon:
Hue: 2.5YR to 10YR
Value: 4 to 6
Chroma: 3 to 8
Other colors: may be mottled with above colors and with colors with a chroma of 1 or 2
Redoximorphic features: none to common gray clay films and none to common iron-manganese concentrations
Texture: silty clay, silty clay loam, clay loam, or clay
Clay content: 29 to 60 percent
Gravel fragments: 0 to 6 percent
Base saturation: 40 to 85 percent
Reaction: neutral to very strongly acid

2Bt horizon (where present):
Hue: 10YR
Value: 4 to 6
Chroma: 3 to 8
Redoximorphic features: none to common gray clay films, none to common iron-manganese concentrations, and none to common soft masses of manganese
Texture: silty clay, silty clay loam, clay loam, or clay
Clay content: 29 to 60 percent
Rock fragments: 0 to 6 percent
Base saturation: 40 to 85 percent
Reaction: strongly acid to slightly acid

2Btg horizon (where present):
Hue: 10YR
Value: 5 to 6
Chroma: 2
Redoximorphic features: none to common iron-manganese concentrations, none to common soft masses of manganese, and none to common masses of iron accumulation
Texture: silty clay, silty clay loam, clay loam, or clay
Clay content: 29 to 60 percent
Gravel fragments: 0 to 6 percent
Base saturation: 40 to 85 percent
Reaction: strongly acid to slightly acid

2C horizon:
Mottled in the colors:
Hue: 10YR
Value: 4 to 7
Chroma: 1 to 8
Redoximorphic features: common to many iron-manganese concentrations, common masses of iron accumulation
Texture: silty clay loam, clay loam, or sandy clay loam
Reaction: slightly acid to very strongly acid

COMPETING SERIES: These are the Liberal and Moyers series.
Liberal: are 40 to 60 inches to shale bedrock
Moyers: are 40 to 60 inches to shale bedrock.

GEOGRAPHIC SETTING: Barden soils are ridges and side slopes. Slope ranges from 0 to 5 percent. The soils formed in a mantle of loess or other silty material and residuum from shale of Pennsylvanian age. Mean annual precipitation ranges from 940 to 1067 mm (37 to 42 inches). Mean annual temperature ranges from 15 to 16.6 degrees C (59 to 62 degrees F). Elevation is 210 to 385 meters (689 to 1263 feet) above mean sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Barco, Coweta, Deepwater, Hartwell, Medoc, Opolis, Parsons, Sylvania and Zaar soils.
Barco soils are moderately deep and have less clay and occur on the ridgetop.
Coweta soils are shallow to bedrock and occur on smooth upland ridges.
Deepwater soils are in the fine-silty particle size family and occur on upland ridges.
Hartwell soils have an abrupt textural boundary and occur on similar positions.
Medoc soils have an abrupt textural boundary and are somewhat poorly drained occurring on smooth plains.
Opolis soils have an abrupt textural boundary and occur on smooth plains.
Parsons soils have an abrupt textural boundary and occur on upland plains.
Sylvania soils are deep and have lower base saturation in the argillic.
Zaar soils do not have an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. Potential for surface runoff is medium. Saturated hydraulic conductivity is moderately high (4 to 14 micrometers per second) in the upper part and moderately low (.4 to 1.4 micrometers per second) in the lower part. Permeability is slow.

USE AND VEGETATION: These soils are used for cultivated crops or hay and pasture. Native vegetation is tall grasses.

DISTRIBUTION AND EXTENT: MLRAs 112, 116A and 116B of southwest and west central Missouri. The type location is in MLRA 112. The soils are of large extent.

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

SERIES ESTABLISHED: Barton County, Missouri, 1969.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:

Particle-size control section: The zone from 46 cm to 97 cm (18 to 38 inches).
Mollic epipedon: The zone from o to 28 cm (0 to 11 inches). (A horizons)
Argillic horizon: The zone from 46 to 142 cm (18 to 56 inches). (Bt1, Bt2, and Bt3 horizons)
Lithologic discontinuity: At the upper boundary of the 2Bt horizon.

The soil is not a mollisol because of base saturation in the argillic horizon is less than 50 percent. The original description did not include a lithologic discontinuity between the loess and shale. This has been updated to reflect the discontinuity. There is a potential of several lithological discontinuities.

The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

7/19/01 - PRF- moved to a semi tab format. Included the discontinuity, added new series as associated soils

ADDITIONAL DATA:

National Cooperative Soil Survey
U.S.A.