LOCATION ARBONE IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Calcic Haploxerolls
TYPICAL PEDON: Arbone loam - cultivated. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 7 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; moderate very fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine irregular pores; about 5 percent angular gravel; slightly alkaline (pH 7.4); gradual smooth boundary. (5 to 10 inches thick)
A--7 to 10 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium granular structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine tubular pores; about 5 percent angular gravel; slightly alkaline (pH 7.4); gradual wavy boundary. (2 to 9 inches thick)
Bw--10 to 14 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak medium and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine and fine tubular pores; about 5 percent angular gravel; slightly alkaline (pH 7.4); clear wavy boundary. (3 to 9 inches thick)
Bk1--14 to 19 inches; light brownish gray (10YR 6/2) and light gray (10YR 7/2) loam, dark grayish brown (10YR 4/2) and grayish brown (10YR 5/2) moist; weak medium and fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common fine and very fine roots; many very fine and fine tubular pores; about 3 percent angular fine gravel; strongly effervescent, common fine lime veins and spots; slightly alkaline (pH 7.6); gradual smooth boundary. (4 to 10 inches thick)
Bk2--19 to 38 inches; very pale brown (10YR 8/2) and light gray (10YR 7/2) loam, light brownish gray (10YR 6/2) and pale brown (10YR 6/3) moist; massive; hard, friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine tubular pores; about 3 percent angular fine gravel; strongly effervescent, many lime veins and splotches; slightly alkaline (pH 7.8); gradual wavy boundary. (10 to 30 inches thick)
C--38 to 60 inches; light brown (7.5YR 6/3) loam, brown (7.5YR 4/3) moist; massive; hard, firm, slightly sticky and slightly plastic; few fine and very fine roots; many very fine tubular pores; about 4 percent subangular fine gravel; slightly effervescent, common lime veins and splotches; slightly alkaline (pH 7.8).
TYPE LOCATION: Power County, Idaho; 800 feet east and 400 feet north of the center of sec. 28, T. 11 S., R. 33 E.
RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 10 to 19 inches
Depth to calcic horizon - 12 to 25 inches
Average annual soil temperature - 42 to 47 degrees F.
Particle size control section
Clay percent - 10 to 18
Coarse fragments - 0 to 35 percent (mainly gravel)
A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Texture - L, SIL
Reaction - neutral or moderately alkaline
Rock fragments - 0 to 15 percent
Bw horizon
Value - 4 through 6 dry, 2 or 3 moist
Chroma - 2 through 4 dry or moist
Texture - L, SIL, GR-L, GR-SIL
Reaction - moderately or moderately alkaline
Bk horizon
Value - 5 through 8 dry, 4 through 6 moist
Chroma - 2 through 4 dry or moist
Texture - L, SIL, GR-L, GR-SIL
Reaction - moderately or moderately alkaline
Calcium Carbonate equivalent - 5 to 35 percent
COMPETING SERIES: These are the Blacknoll, Jacoby (T), Kackley (T), and Kearl series. Blacknoll, Jacoby and Kackley soils are moderately deep. Kearl soils are moderately deep to sandstone bedrock.
GEOGRAPHIC SETTING: Arbone soils are on fan terraces, hillsides, toeslopes, and mountainsides. Slopes range from 0 to 30 percent. They formed in mixed alluvium derived mainly from sandstone and quartzite with lesser amounts of limestone and basalt. The mean annual precipitation is 12 to 16 inches, and the mean annual temperature is 41 to 45 degrees F. The frost-free season is 75 to 100 days. Elevation ranges from 4,500 to 6,900 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cedarhill, Hondoho, Lanoak, Newdale, Rexburg, Ririe, Wahtigup, and Wheelerville soils. Cedarhill and Hondoho soils are loamy-skeletal. Lanoak soils are fine-silty and lack calcic horizons within 40 inches. Newdale, Rexburg, Ririe, and Wheelerville soils are coarse-silty. In addition, Wheelerville soils lack mollic epipedons. Wahtigup soils are fine-loamy. Cedarhill soils are on hillslopes associated with limestone parent material. Hondoho soils are on terraces and footslopes in areas of more gravelly parent material. Lanoak soils are on north and east-facing slopes. Newdale, Rexburg, Ririe, and Wheelerville soils are on loess-mantled fan terraces. Wahtigup soils are on south-facing slopes associated with limestone parent material.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderate permeability.
USE AND VEGETATION: Used as irrigated and non-irrigated cropland and as rangeland. The potential natural vegetation is bluebunch wheatgrass, Idaho fescue, and mountain big sagebrush.
DISTRIBUTION AND EXTENT: Moderately extensive in southeastern Idaho.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Power County, Idaho, 1976.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface to 10 inches (Ap and A1 horizons).
Calcic horizon - the zone from 14 to 38 inches (Bk1 and Bk2 horizons).
Particle-size control section - the zone from 10 to 40 inches (Bw, Bk1, Bk2 horizons and part of the C horizon).