LOCATION JAY AR+OKEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Oxyaquic Fragiudalfs
TYPICAL PEDON: Jay silt loam, 4 percent slope, pasture-meadow. (Colors are for moist soil unless otherwise stated.)
Ap--O to 9 inches; dark brown (10YR 3/3) silt loam; brown (10YR 5/3) dry; weak fine granular structure; very friable; many fine roots; few fine dark concretions; moderately acid; abrupt smooth boundary. (5 to 10 inches thick)
A--9 to 16 inches; very dark grayish brown (10YR 3/2) silt loam; grayish brown (10YR 5/2) dry; weak medium subangular blocky structure; very friable; many fine roots; common fine pores; few fine dark concretions; strongly acid; gradual smooth boundary. (0 to 10 inches thick)
Bt--16 to 25 inches; yellowish brown (10YR 5/6) silt loam; moderate medium blocky structure; firm; common fine pores; common fine roots; thin continuous clay films on ped faces and lining pores; clay films have granular pitted surfaces, and uncoated very fine sand and silt grains are evident; few fine dark concretions; strongly acid; clear wavy boundary. (5 to 23 inches thick)
Btxl--25 to 56 inches; variegated, yellowish brown (10YR 5/8) light brownish gray (10YR 6/2), and yellowish red (5YR 5/8) silt loam; weak coarse prismatic parting to moderate medium subangular blocky structure; firm, brittle; common fine pores; common fine roots between prisms, no roots in prism interiors; thin continuous clay films on blocky ped faces; common distinct pale brown (10YR 6/3) silt loam clay depletions on faces of prisms; many medium and coarse dark concretions; strongly acid; gradual wavy boundary. (18 to 30 inches thick).
Btx2--56 to 72 inches; variegated, light gray (10YR 6/1) and strong brown (7.5YR 5/8) silty clay loam; coarse prismatic parting to moderate medium blocky structure; firm, brittle; thin continuous clay films on blocky ped faces; common distinct pale brown (10YR 6/3) silt loam clay depletions on prism faces; few medium black concretions; moderately acid.
TYPE LOCATION: Washington County, Arkansas; 9 miles north of Viney Grove; NW1/4NE1/4NW1/4, sec. 36, T. 16 N., R. 32 W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to consolidated siltstone, or cherty limestone bedrock is over 60 inches. Depth to the fragipan ranges from 18 to 30 inches. Reaction ranges from strongly acid through slightly acid in the A horizon is very strongly through moderately acid in the B horizon. Gravel content ranges from 0 to 5 percent by volume above the fragipan.
The A horizon have hue 10YR, value of 3 and chroma of 2 or 3, or value of 2 and chroma of 2.
The BE horizon, where present, has hue of 10YR or 7.5YR, value of 5, and chroma of 4. Texture is silt loam.
The Bt horizon has hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 4 through 8. Some pedons masses of iron acumulations in shades of brown or red in the lower part. Texture is silt loam or silty clay loam.
The Btx horizon has hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 4 to 8, or with hue of 5YR, value of 4 or 5, and chroma of 4 or 6, and iron accumulations and depletions and in shades of gray, brown and red, or it is a variegated horizon in shades of gray, brown and red. Texture is silt loam, silty clay loam or their gravelly analogs. Gravel content of the Btx horizon ranges from 0 to 30 percent by volume.
The B't horizon below the fragipan, where present, is variable in short distances. Hue ranges from 10YR to 2.5YR, value of 3 to 5 and chroma of 4 to 8 with iron accumulations and depletions in shades of gray, brown or red or it is a variegated horizon in shades of red, gray, and brown. Texture is silty clay loam, silty clay, clay or their gravelly or very gravelly anlogs. Gravel content of the B't ranges from 0 to 60 percent by volume.
COMPETING SERIES: The Loring series is in this family. Loring soils developed in loess and contain no coarse fragments.
GEOGRAPHIC SETTING: Jay soils are on nearly level to gently sloping uplands of the Ozark Highlands, MLRA 116A, that were historical prairies. Slope gradients range from 1 to 8 percent. The soil formed in loamy residuum. The underlying bedrock is siltstone or cherty limestone. Average annual temperature at the type location is about 57 degrees F and the average annual precipitation is about 44 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Captina, Choteau, Dennis and Taloka soils. Captina soils, which are on adjacent similar upland slopes, do not have thick, dark surface layers. The Choteau and Dennis soils, which are on similar upland slopes, are in a fine particle size class and do not have fragipans. The Taloka soils, which are on adjacent slightly depressional slopes, are in a fine particle size class and do not have a fragipan.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is medium. Permeability is moderate above the fragipan and slow within it. These soils have a seasonally high water table 2 to 3 below the surface from December through April.
USE AND VEGETATION: Most areas are used for pasture and haylands but some areas are also cultivated for a variety of crops. Native vegetation was tall prairie grasses.
DISTRIBUTION AND EXTENT: Ozark Highlands, MLRA 116A, and Cherokee Prairies, MLRA 112 areas of Arkansas, Oklahoma and possibly Kansas and Missouri. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Adair County, Oklahoma; 1963.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic Epipedon - The zone from the surface to a depth of 16 inches.
Argillic Horizon - The zone from 16 to 72 inches.
Fragipan - The zone from 25 to 72 inches.
ADDITIONAL DATA: Characterization of the typical pedon by the University of Arkansas Soil Characterization Laboratory. Sample number: S63AR-143-004.