LOCATION QUARLES                 MO+OK

Established Series
Rev. PRF
09/2012

QUARLES SERIES

The Quarles series consists of deep, poorly drained, slowly permeable soils formed in alluvium. These soils are on stream terraces and have slope of 0 to 2 percent. Mean annual temperature is 60 degrees F, and mean annual precipitation is 40 inches.

TAXONOMIC CLASS: Fine, mixed, active, thermic Mollic Endoaqualfs

TYPICAL PEDON: Quarles silt loam - on a .5 percent slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 8 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; moderate fine granular structure; friable; common fine roots; common fine dark concretions (oxides); strongly acid; abrupt smooth boundary. (6 to 10 inches thick)

Eg--8 to 18 inches; gray (10YR 5/1) silt loam; weak medium platy structure; very friable; common fine roots; common fine dark concretions (oxides); very strongly acid; clear smooth boundary. (8 to 14 inches thick)

Btg1--18 to 24 inches; dark gray (10YR 4/1) silty clay loam; common fine distinct yellowish brown (10YR 5/6) mottles; moderate fine subangular blocky structure; firm; few fine roots; common distinct clay films; common fine dark concretions (oxides); very strongly acid; gradual smooth boundary.

Btg2--24 to 36 inches; dark gray (10YR 4/1) silty clay; common fine distinct yellowish brown (10YR 5/6) mottles; moderate medium subangular blocky structure; very firm; common distinct clay films; common fine dark concretions (oxides); strongly acid; gradual smooth boundary.

Btg3--36 to 48 inches; mottled dark gray (10YR 4/1), brown (10YR 4/3), and yellowish brown (10YR 5/6) silty clay loam; weak coarse subangular blocky structure; firm; few faint clay films; few fine dark concretions (oxides); medium acid; gradual smooth boundary.

Btg4--48 to 62 inches; mottled dark gray (10YR 4/1), yellowish brown (10YR 5/6), and strong brown (7.5YR 5/6) silty clay loam; weak fine subangular blocky structure; firm; few faint clay films; slightly acid.

TYPE LOCATION: Henry County, Missouri; about 13 miles north and west of Clinton; 300 feet west and 200 feet north of the southeast corner of sec. 7, T. 43 N., R. 26 W.

RANGE IN CHARACTERISTICS: Solum thickness ranges from 36 to more than 60 inches.
.
Ap or A horizon
Hue: 10YR,
Value: 2 or 3
Chroma: 1 or 2
Reaction: strongly acid to neutral

E horizon
Hue: 10YR
Value: 4 to 6
Chroma: 1 or 2
Reaction: very strongly acid to moderately acid.

Upper part of the Btg horizon
Hue: 10YR or 2.5Y
Value: 3 to 6
Chroma: 1 or less with brighter mottles
Reaction: strongly acid or very strongly acid

Lower part of the Btg horizon
Hue: mottled 10YR and 7.5YR
Value: 4 or 6
Chroma: 1 to 6
Reaction: strongly acid to slightly acid.
Texture: silty clay or silty clay loam.

COMPETING SERIES: The Quarles series is the only member of the family. Other similar series are the Muldrow, Parsons, Taloka, and Urich series. Muldrow soils have mollic epipedons more than 20 inches thick. Parsons and Taloka soils have an abrupt textural change. Urich soils have mollic epipedons and less clay in the subsoil.

GEOGRAPHIC SETTING: Quarles soils are on stream terraces and formed in alluvium. Slopes range from 0 to 2 percent. The mean annual temperature ranges from 59 to 62 degrees F, and mean annual precipitation ranges from 37 to 42 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Muldrow and Urich soils and the Osage and Verdigris soils. Muldrow and Urich soils are on similar positions. Osage soils have a thickened mollic epipedon and are on flood plains. Verdigris soils have a thickened mollic epipedon, less clay, are better drained and on flood plains.

DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is slow. Permeability is slow.

USE AND VEGETATION: Most areas are cultivated; others are used for hay and pasture. Native vegetation is tall prairie grasses with some hardwood trees.

DISTRIBUTION AND EXTENT: West-central Missouri and adjacent parts of Oklahoma.

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

SERIES ESTABLISHED: Henry County, Missouri, 1972.

REMARKS: Diagnostic horizons and features recognized in this series are: Ochric epipedon - the zone from the surface of the soil to a depth of 18 inches (Ap horizon). The upper 8 inches has color to qualify for a mollic subgroup. Albic horizon - the zone from 8 to 18 inches (Eg horizon). Argillic horizon - the zone from approximately 18 to 62 inches (Btg1, Btg2, Btg3 and Btg4 horizons).

5/25/00: PRF: modified classification to Endo from Ochr. Expanded value in Btg from 5 to 6. Per Richard Tummons.

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National Cooperative Soil Survey
U.S.A.