LOCATION SADORUS IDEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, frigid Lithic Haploxerolls
TYPICAL PEDON: Sadorus gravelly loam on a southwest slope of 1 percent at an elevation of 5,680 feet. On May 25, 1983, when this profile was described the soil was moist below 7 inches. (Colors are for dry soil unless otherwise noted.)
A1--0 to 7 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; weak fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and medium roots; few fine tubular pores; about 18 percent gravel and 3 percent angular cobbles; neutral (pH 6.8); clear smooth boundary. (3 to 8 inches thick).
Bw--7 to 17 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium roots; few fine tubular and common fine vesicular pores; about 20 percent gravel and 5 percent angular cobbles; neutral (pH 7.0); abrupt wavy boundary. (7 to 17 inches thick).
2R--17 inches; Densely welded rhyolitic tuff.
TYPE LOCATION: Fremont County, Idaho; about five miles west and six miles north of Ashton, about 100 feet east and 2500 feet south of the northwest corner of section 6, T.9N., R.42E.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 39 to 42 degrees F.
Average summer soil temperature - 60 to 62 degrees F.
Average clay in control section - 5 to 12 percent
Depth to bedrock - 10 to 20 inches
Thickness of mollic epipedon - 10 to 20 inches
Reaction - slightly acid or neutral
A horizon
Value - 4 or 5 dry
Chroma - 2 or 3 dry or moist
Bw horizon
Hue - 10YR or 7.5YR
Value - 4 through 6 dry, 3 or 4 moist
Chroma - 2 or 3 dry or moist
Texture - GR-L, L, or GR-SL
COMPETING SERIES: These are the Choptie, Doyn (T), Nuss, Quicksilver, and Spaa series. Choptie soils have more than 12 percent clay in the profile and the average annual temperatures exceed 42 degrees F. Doyn soils are 10 inches or less to hard bedrock. Nuss soils have 18 to 30 percent clay in the particle-size control section. Quicksilver soils have average annual soil temperatures of 42 to 47 degrees F. and have 25 percent or more coarse and very coarse sand in the particle-size control section. Spaa soils have Bk horizons, average annual temperatures greater than 42 degrees F. and average summer soil temperatures in excess of 62 degrees F.
GEOGRAPHIC SETTING: Sadorus soils are on dissected mountain sides, foothills, and nearly level terraces. They formed in loess and eolian material from mixed sources and weathered rhyolite. Slopes are 1 to 60 percent. Elevations are 5100 to 6,300 feet. The average annual precipitation is 17 to 22 inches. The average annual temperature is 37 to 40 degrees F. The frost-free season is 70 to 90 days. Moisture consists of 2 to 4 feet of snow, late winter and early spring rains and brief summer storms.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Vadnais, Jipper and Kucera soils. Vadnais soils are 20 to 40 inches deep on adjacent slopes and terraces. Jipper and Kucera soils are 60 inches or more to bedrock on adjacent undulating plains that are in cropland.
DRAINAGE AND PERMEABILITY: Well drained. Slow to rapid runoff. Moderately rapid permeability.
USE AND VEGETATION: Rangeland and wildlife habitat. Dominant vegetation is mountain big sagebrush, Idaho fescue, bluebunch wheatgrass, and arrowleaf balsamroot.
DISTRIBUTION AND EXTENT: Southeastern Idaho. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Fremont County, Idaho, 1989.
REMARKS: Diagnostic properties recognized include:
Particle-size control section - 10 to 17 inches. (most of the Bw horizon).
Mollic epipedon - From the surface to 17 inches. (A1 and Bw horizons).
Lithic contact: Densely welded rhyolitic tuff at 17 inches.