LOCATION BRONAUGH MO
Established Series
Rev. KDV
09/2012
BRONAUGH SERIES
The Bronaugh series consists of deep, well drained, moderately permeable soils formed in residuum from shale. These soils are on uplands and have slopes of 1 to 9 percent. Mean annual temperature is 59 degrees F, and mean annual precipitation is 38 inches.
TAXONOMIC CLASS: Fine, mixed, active, thermic Mollic Hapludalfs
TYPICAL PEDON: Bronaugh silt loam - on a 4 percent slope in pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; dark brown (7.5YR 3/2) silt loam, brown (7.5YR 5/2) dry; strong fine granular structure; very friable; many roots; few worm channels and casts; few fine dark concretions (oxides); medium acid; clear smooth boundary. (6 to 10 inches thick)
Bt1--7 to 15 inches; dark reddish brown (5YR 3/4) silty clay loam; common fine distinct yellowish red (5YR 5/6) mottles; strong very fine subangular blocky structure; friable; few fine roots; few faint clay films; common worm channels and casts; common fine dark concretions (oxides); strongly acid; gradual smooth boundary.
Bt2--15 to 25 inches; reddish brown (2.5YR 4/4) silty clay, few fine prominent yellowish red (5YR 5/6) mottles; strong fine angular and subangular blocky structure; few fine roots; many faint clay films; few worm channels; many fine dark concretions and stains (oxides); medium acid; gradual smooth boundary.
Bt3--25 to 36 inches; red (2.5YR 4/6) silty clay; common medium faint reddish brown (2.5YR 4/4) mottles; moderate fine angular and subangular blocky structure; firm; few fine roots; many distinct clay films; few worm channels; many dark concretions and common stains (oxides); medium acid; gradual smooth boundary.
Bt4--36 to 47 inches; yellowish red (5YR 5/6) silty clay loam; moderate and weak fine subangular blocky structure; firm; few roots; many distinct clay films; few worm channels; many dark concretions (oxides); medium acid; gradual smooth boundary. (Combined thickness of the Bt horizons is 30 to 54 inches.)
C--47 to 72 inches; dark yellowish brown (10YR 3/4) silty clay loam; common medium distinct strong brown (7.5YR 5/6) and few fine distinct grayish brown (10YR 5/2) mottles; massive; friable; few fine roots; few distinct clay films or flows on vertical cleavages; many dark concretions (oxides); medium acid.
TYPE LOCATION: Barton County, Missouri; about 3 miles west and one mile north of Hannon; 1,725 feet north and 1,375 feet west of the southeast corner, sec. 4, T. 33 N., R. 33 W.
RANGE IN CHARACTERISTICS: Thickness of the solum and depth to bedrock ranges from 40 to 60 inches or more. Some part of the surface soil or argillic horizon has base saturation less than 50 percent.
The Ap or A horizon has hue of 10YR, 7.5YR, or 5YR; value of 2 or 3 moist and 4 or 5 dry; and chroma of 2 or 3. It is silt loam, loam or silty clay loam and strongly acid to neutral. Some pedons have a BA horizon similar in color and texture to the A horizon.
The Bt horizon has hue of 5YR or 2.5YR, value of 3 to 5, and chroma of 4 to 8. It is silty clay, silty clay loam, or clay loam and strongly acid or medium acid.
The C horizon has hue of 10YR or 7.5YR, value of 3 to 5, and chroma of 4 to 8. It is silty clay loam or clay loam and strongly acid or medium acid. Some pedons have a Cr horizon.
COMPETING SERIES: There are no other series in the family. Other competing series are the
Barden,
Dennis,
Liberal, and
Newtonia soils. Barden, Dennis, and Liberal soils have chroma of 2 in the upper 10 inches of the argillic horizon and do not have the redder hues. Newtonia soils are fine-silty.
GEOGRAPHIC SETTING: Bronaugh soils are on convex ridgetops and knolls and formed in residuum from shale. Slopes range from 1 to 9 percent. The mean annual temperature ranges from 58 to 60 degrees F, and mean annual precipitation ranges from 37 to 42 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Barden and
Liberal soils and the
Collinsville and
Barco soils. Barden soils are on lower divides, and Liberal soils are on similar positions. Collinsville and Barco soils are shallower to bedrock and are on similar positions or breaks below the Bronaugh soils.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is medium. Permeability is moderate.
USE AND VEGETATION: These soils are used for cultivated crops and some hay and pasture. Native vegetation is tall grasses.
DISTRIBUTION AND EXTENT: West-central Missouri. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Barton County, Missouri, 1969.
REMARKS: Diagnostic horizons and features recognized in this series are: ochric epipedon - the zone from the surface of the soil to a depth of 7 inches (Ap horizon); argillic horizon - the zone from approximately 7 inches to 47 inches (Bt1, Bt2, Bt3 and Bt4 horizons); udic moisture regime.
National Cooperative Soil Survey
U.S.A.