LOCATION EDLIN WYEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Ustic Haplocalcids
TYPICAL PEDON: Edlin fine sandy loam-rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 4 inches; brown (10YR 5/3) fine sandy loam, dark grayish brown (10YR 4/2) moist; weak medium platy structure; soft, very friable, slightly sticky and slightly plastic; common fine and very fine roots; mildly alkaline (pH 7.4); clear smooth boundary. (1 to 7 inches thick)
Bw--4 to 11 inches; brown (10YR 5/3) fine sandy loam, dark brown (10YR 4/3) moist; weak coarse prismatic structure parting to weak and moderate coarse and medium subangular blocky; soft, very friable, slightly sticky and slightly plastic; common fine and very fine roots; mildly alkaline (pH 7.4); gradual smooth boundary. (5 to 18 inches thick)
Bk--11 to 30 inches; pale brown (10YR 6/3) fine sandy loam, light olive brown (2.5Y 5/4) moist; weak coarse prismatic structure parting to weak medium subangular blocky; hard, very friable, slightly sticky and slightly plastic; few very fine, fine, and medium roots; strongly effervescent, lime disseminated and as thin coatings on few pebbles; mildly alkaline (pH 7.8); gradual wavy boundary. (10 to 45 inches thick)
C--30 to 60 inches; pale brown (10YR 6/3) fine sandy loam, light olive brown (2.5Y 5/4) moist; massive; soft, very friable, slightly sticky and slightly plastic; strongly effervescent, authigenic lime is disseminated; mildly alkaline (pH 7.8).
TYPE LOCATION: Sweetwater County, Wyoming; 6 miles north of Farson and 50 feet NW of bridge over canal; center of NE1/4, SW1/4, sec. 27, T. 26 N., R. 106 W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 43 to 47 degrees F. The mean summer soil temperature is 59 to 63 degrees F. Depth to the base of the cambic horizon and continuous accumulations of carbonate ranges from 10 to 23 inches. Pebble content typically is 0 to 5 percent but ranges to 15 percent in some pedons. The pebbles are rounded and mostly less than 1 inch in diameter. Depth to any strongly contrasting material is over 40 inches.
The A horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry, 3 through 5 moist, and chroma of 2 or 3. EC is 0 to 2 mmhos. It is neutral or mildly alkaline.
The Bw (cambic) horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 through 4. It is fine sandy loam or sandy loam with clay content of 10 to 18 percent. EC is 0 to 2 mmhos. It is neutral through moderately alkaline.
The Bk (calcic) horizon has hue of 10YR or 2.5Y, value of 5 through 7 dry, 4 through 7 moist, and chroma of 2 through 4. It is fine sandy loam or sandy loam with 10 to 18 percent noncarbonate clay. Calcium carbonate equivalent ranges from 8 to 20 percent. EC is 0 to 4 mmhos. It is mildly alkaline through strongly alkaline.
The C horizon has hue of 10YR or 2.5Y, value of 5 through 6 dry, 4 or 5 moist, and chroma of 2 through 4. It is fine sandy loam, sandy loam, or loam. Some pedons are loamy sand below 40 inches; others contain thin stratification. EC is 0 to 4 mmhos. It is mildly alkaline or moderately alkaline.
COMPETING SERIES: These are the Busby, Hawkstone, Sobson, Spang, Toby, and Twilight series. Busby soils do not have a calcic horizon. Hawkstone soils are leached free of carbonates above 40 inches. Sobson and Twilight soils have a paralithic contact at 20 to 40 inches. Spang soils have hue of 2.5YR through 7.5YR. Toby soils are noncalcareous above 30 inches.
GEOGRAPHIC SETTING: Edlin soils are alluvial fan aprons, toeslopes, and footslopes. Slopes are mostly 3 to 10 percent but may range from 0 to 45 percent. The alluvium is mixed and derived from primarily sedimentary rocks, but some fans contain material weathered from igneous beds. Elevation is 5,800 to 7,800 feet. The mean annual temperature is about 37 to 45 degrees F., and the mean annual precipitation is 7 to 12 inches. The frost-free season is about 60 to 110 days depending upon aspect and air drainage.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Huguston and Space City soils. Huguston soils are shallow to sandstone bedrock. Space City soils are sandy and occupy duned topography intermixed with other soils.
DRAINAGE AND PERMEABILITY: Well drained; runoff is slow or medium; permeability is moderately rapid.
USE AND VEGETATION: Rangeland and wildlife habitat. Native vegetation is mainly big sagebrush, low rabbitbrush, Indian ricegrass, and needleandthread. Some small areas are also in irrigated cropland, mainly hay and small grains.
DISTRIBUTION AND EXTENT: Edlin soils are moderately extensive, occurring throughout southwest Wyoming.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Natrona County Area, Wyoming; 1985.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--0 to 4 inches(A)
Cambic horizon--4 to 11 inches(Bw)
Calcic horizon--11 to 30 inches(Bk)
Borollic feature--.5 to 1.0 percent organic carbon in the A horizon and a frigid temperature regime meet the requirements for the Borollic subgroup.