LOCATION REGET WY
Established Series
Rev. PJL-JAL
01/2023
REGET SERIES
The Reget series consists of well drained soils that are moderately deep to soft shale. They formed in residuum and colluvial slopewash weathered from shale. Reget soils are on rock-controlled hills, ridges, and short fan aprons. Slopes are 2 to 60 percent. The mean annual precipitation is about 18 inches, and the mean annual temperature is about 41 degrees F.
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Argiustolls
TYPICAL PEDON: Reget clay loam-rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 1 inch; dark grayish brown (2.5Y 4/2) clay loam, very dark grayish brown (2.5Y 3/2) moist; moderate very fine granular structure; slightly hard, very friable, nonsticky and slightly plastic; many fine and very fine roots; slightly alkaline (pH 7.8); abrupt smooth boundary. (0 to 3 inches thick)
Bt--1 to 9 inches; dark grayish brown (2.5Y 4/2) clay, very dark olive brown (2.5Y 3/3) moist; strong medium subangular blocky structure parting to strong fine and very fine angular blocky; extremely hard, firm, slightly sticky and moderately plastic; common fine and very fine roots; many prominent clay films on all faces of peds; moderately alkaline (pH 8.0); clear smooth boundary. (7 to 18 inches thick)
Btk1--9 to 16 inches; grayish brown (2.5Y 5/2) clay, dark grayish brown (2.5Y 4/2) moist; strong medium subangular blocky structure parting to strong fine and very fine angular blocky; extremely hard, firm, slightly sticky and moderately plastic; few fine and very fine roots; many prominent clay films on all faces of peds; strongly effervescent, calcium carbonate as few thin filaments; moderately alkaline (pH 8.2); clear smooth boundary. (5 to 9 inches thick)
Btk2--16 to 36 inches; light brownish gray (2.5Y 6/2) clay, grayish brown (2.5Y 5/2) moist; strong coarse subangular blocky structure parting to moderate medium angular blocky; extremely hard, firm, slightly sticky and moderately plastic; common distinct clay films on all faces of peds; strongly effervescent; calcium carbonate as few medium and coarse masses; strongly alkaline (pH 8.5); clear wavy boundary. (8 to 20 inches thick)
Cr--36 to 60 inches; moderately hard, gray (5Y 6/1); slightly effervescent; platy shales with many medium and coarse masses of sulfates between the plates.
TYPE LOCATION: Sheridan County, Wyoming; approximately 15 feet south of trail up sideslope. SE1/4, SW1/4 of Sec. 5, T. 57 N., R. 87 W.
RANGE IN CHARACTERISTICS: The mollic epipedon is typically 7 to 9 inches thick but ranges from 7 to 19 inches. Depth to bedrock and a paralithic contact ranges from 20 to 40 inches. The mean annual soil temperature ranges from 41 to 47 degrees F., and the mean summer temperature ranges from 59 to 63 degrees F. These soils are typically free of carbonates through the upper part of the Bt horizon. Rock fragments are typically less than 5 percent but may range from 0 to 15 percent. EC ranges from 0 to 4 mmhos throughout.
The A horizon has hue of 2.5Y or 10YR, value of 4 through 6 dry, 2 or 3 moist, and chroma of 2 or 3. Reaction is neutral or slightly alkaline.
The Bt horizon has hue of 2.5Y or 10YR, value of 3 or 4 dry, 2 through 4 moist, and chroma of 2 through 4. Texture is clay or heavy clay loam with 35 to 60 percent clay with more than 15 but less than 35 percent fine or coarser sand. Reaction is neutral through moderately alkaline.
The Btk horizon has hue of 5Y through 10YR, value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 through 4. Texture is clay or heavy clay loam. Calcium carbonate ranges from 4 to 15 percent. Reaction is moderately or strongly alkaline. A C horizon is present in some pedons.
COMPETING SERIES: These are the
Bearpaw,
Brolliar,
Cerro,
Danvers,
Fergus,
Gerber,
Grail,
Mondamin,
Montillo,
Pagoda,
Regent,
Ridgeview,
Wyola,
Suposo,
Tomasaki,
Tsoodzil, and
Yankee series. The Brolliar and Montillo soils have a lithic contact at 20 to 40 inches. The Bearpaw, Cerro, Danvers, Fergus, Gerber, Grail, Mondamin, Pagoda, Ridgeview, Wyola, Suposo, Tomasaki, Tsoodzil, and Yankee soils are very deep. Regent soils have silty clay or silty clay loam Bt horizons.
GEOGRAPHIC SETTING: The Reget soils are on rock-controlled hills, ridges, and short fan aprons. These soils formed in residuum and colluvial slopewash weathered from shale. Slopes are 2 to 60 percent. Elevations are 4,000 to 5,000 feet. The climate is cool and semiarid. The mean annual precipitation is 15 to 19 inches of which about half falls from April through July. The mean annual temperature is 39 to 44 degrees F. The frost-free season is about 80 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Farnuf,
Savar,
Reeder, and
Norbert soils and the competing
Wyola soils. The Farnuf soils have bedrock deeper than 40 inches and have less clay in the control section. Savar soils have bedrock at depths greater than 40 inches. Reeder soils have less clay in the control section.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; slow permeability.
USE AND VEGETATION: Rangeland, wildlife habitat, and limited dryland cultivation and irrigated hayland. The native vegetation consists of Idaho fescue, Columbia needlegrass, prairie junegrass, and big sagebrush.
DISTRIBUTION AND EXTENT: North central Wyoming. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Sheridan County Area, Wyoming; 1987.
REMARKS: diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 0 to 9 inches (A,Bt)
Argillic horizon - 1 to 36 inches (Bt,Btk1,Btk2)
Paralithic contact - 36 inches (Cr)
SIR - WY0687
National Cooperative Soil Survey
U.S.A.