LOCATION REDPINE IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Calcic Argixerolls
TYPICAL PEDON: Redpine loam, rangeland; on a 12 percent slope at an elevation of 6,400 feet. (Colors are for dry soil unless otherwise stated.)
A--0 to 4 inches; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine and few medium and coarse roots; 10 percent gravel; neutral (pH 6.8); clear smooth boundary. (4 to 6 inches thick)
AB--4 to 10 inches; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; moderate fine and medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many very fine and fine and few medium and coarse roots; 10 percent gravel; neutral (pH 6.8); clear smooth boundary. (4 to 8 inches thick)
Bt1--10 to 16 inches; dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure; hard, firm, moderately sticky and moderately plastic; common very fine and fine and few medium roots; common discontinuous faint clay films on faces of peds and in pores; 10 percent gravel; neutral (pH 7.0); clear smooth boundary.
Bt2--16 to 22 inches; grayish brown (10YR 5/2) clay loam, dark grayish brown (10YR 4/2) moist; strong medium prismatic structure; very hard, firm, moderately sticky and moderately plastic; common very fine and fine and few medium roots; common continuous distinct clay films on faces of peds and in pores; 10 percent gravel and 5 percent paragravel; neutral (pH 7.0); clear smooth boundary. (combined thickness of Bt1 and Bt2 is 10 to 18 inches)
Bk--22 to 26 inches; pale brown (10YR 6/3) paragravelly clay loam, brown (10YR 5/3) moist; moderate fine and medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine and fine roots; lime is disseminated and as thin coats surrounding of paragravel; 15 percent paragravel; strongly effervescent; moderately alkaline (pH 7.9); abrupt wavy boundary. (4 to 9 inches thick)
2Cr--26 to 60 inches; light gray (2.5Y 7/1) weakly consolidated ash.
TYPE LOCATION: Bear Lake County, Idaho; about 3 miles west of Bennington, Idaho; about 2,585 feet east and 200 feet north of the southwest corner of section 35, T. 11 S., R. 43 E. (42 degrees 24 minutes 58.3 seconds North Latitude and 111 degrees 23 minutes 44.9 seconds West Longitude.)
RANGE IN CHARACTERISTICS:
Soil moisture control section usually moist, dry in all parts for 45 consecutive days or more in the four months following the summer solstice. Xeric moisture regime.
Thickness of mollic epipedon 10 to 16 inches
Depth to paralithic contact 20 to 40 inches
Average annual soil temperature 42 to 46 degrees F. Frigid soil temperature regime.
Particle-size control section
Clay content 27 to 33 percent
Rock fragments 5 to 20 percent gravel and 0 to 5 percent cobbles
A horizon
Chroma 2 dry or moist
Texture loam
Clay content 16 to 20 percent
Rock fragments 0 to 10 percent gravel
Reaction neutral (pH 6.6 to 7.3)
AB horizon
Chroma 2 dry or moist
Texture loam, gravelly loam
Clay content 16 to 20 percent
Rock fragments 0 to 15 percent gravel
Reaction neutral (pH 6.6 to 7.3)
Bt horizons
Value 4 or 5 dry and 3 or 4 moist
Chroma 2 or 3 dry or moist
Texture clay loam, gravelly clay loam
Clay content 27 to 33 percent
Rock fragments 5 to 20 percent gravel and 0 to 5 percent cobbles
Pararock fragments 0 to 10 percent
Reaction neutral (pH 6.6 to 7.3)
Bk horizon
Value 5 or 6 dry and 4 or 5 moist
Chroma 2 or 3 dry or moist
Texture loam, clay loam, gravelly clay loam, paragravelly clay loam
Clay content 20 to 28 percent
Rock fragments 0 to 20 percent gravel and 0 to 5 percent cobbles
Pararock fragments 10 to 20 percent
Calcium carbonate equivalent 15 to 25 percent
Reaction slightly to moderately alkaline (pH 7.4 to 8.4)
COMPETING SERIES: These are the Bess, Border (I), Cedarpoint, Chesnimnus, Fewkes, Justesen, McCarey, Pegram (T), Pinehollow (T), Vickings, and Victon series. Bess, Border, Cedarpoint, Chesnimnus, Fewkes, Justesen, Pegram, and Vicking soils are very deep. McCarey and Pinehollow soils have a lithic contact at 20 to 40 inches. Vickton soils have a lithic contact at 40 to 60 inches.
GEOGRAPHIC SETTING:
Landform: back slopes and shoulders of hills
Elevation: 5,900 to 6,900 feet
Slope: 8 to 25 percent
Parent Material: alluvium over weakly consolidated ash, tuffaceous calcareous sandstone or siltstone of the Salt Lake Formation.
Climate: long, cool winters; dry, warm summers
Average annual precipitation: 12 to 20 inches
Average annual temperature: 39 to 44 degrees F.
Frost-free season: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brushtop (T), Burchert (T), Draney (T), and Whitetop (T) soils. Brushtop soils are deep to weakly consolidated ash, occupy north-facing aspects and are cryic. Burchert soils are moderately deep to weakly and moderately consolidated tuffaceous sandstone and siltstone, lack a calcic horizon, and occupy similar landscape positions. Draney soils are shallow, are calcareous throughout, and occupy convex shoulder positions. Whitetop soils are shallow, formed in residuum from weakly consolidated ash, and occupy shoulders, summits and upper backslopes.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability
USE AND VEGETATION: These soils are used mainly for wildlife habitat and rangeland. The dominant native vegetation is mountain big sagebrush, serviceberry, common snowberry, antelope bitterbrush, eriogonum, bluebunch wheatgrass, prairie junegrass, and bluegrass.
DISTRIBUTION AND EXTENT: Southeastern Idaho. The series is not extensive. MLRA 43B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008. The name is coined from nearby Pine Hollow road.
REMARKS: Depths to diagnostic horizons and features start from the mineral soil surface. Diagnostic horizons and features recognized in his pedon are:
Mollic epipedon: the zone from 0 to 16 inches (A, AB, and Bt1 horizons)
Argillic horizon: the zone from 10 to 22 inches (Bt1 and Bt2 horizons)
Calcic horizon: the zone from 22 to 26 inches (Bk horizon)
Paralithic contact: 26 inches (2Cr horizon)
Particle-size control section: the zone from 10 to 22 inches (Bt1 and Bt2 horizons)