LOCATION RECK                    ID

Established Series
Rev. GPB/CLM/HBM
08/2021

RECK SERIES

The Reck series consists of very deep, well drained very slowly permeable soils on broad ridges and mountain sideslopes. They formed in slope alluvium from quartzite and occur in areas having evidence of mass movement. Slopes are 5 to 35 percent. The average annual precipitation is about 340 millimeters and average annual temperature is about 2 degrees C.

TAXONOMIC CLASS: Clayey-skeletal, smectitic Vertic Haplocryalfs

TYPICAL PEDON: Reck stony loam -- on an 18 percent convex, west by southwest-facing slope at 2195 meters elevation in rangeland. (Colors are for dry soil unless otherwise noted. When de3scribed on October 4, 1984, the soil was dry to 5 cm and moist below this depth.)

A--0 to 5 cm; brown (7.5YR 4/2) very gravelly loam, dark brown (7.5YR 3/2) moist; weak fine subangular blocky structure parting to weak fine granular; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine and fine interstitial and tubular pores; 30 percent pebbles, 5 percent cobbles, 2 percent stones; neutral (pH 7.0); clear wavy boundary. (3 to 10 cm thick)

BA--5 to 13 cm; brown (7.5YR 4/2) very gravelly clay loam, dark brown (7.5YR 3/2) moist; weak very fine and fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; many very fine and common fine and few medium roots; common very fine and fine tubular pores; 25 percent pebbles, 15 percent cobbles, 5 percent stones; neutral (pH 7.0); clear wavy boundary. (0 to 13 cm thick)

Bt--13 to 23 cm; brown (7.5YR 5/4) very cobbly clay, brown (7.5YR 4/4) moist; moderate fine subangular blocky structure; slightly hard, firm, very sticky and very plastic; common very fine and fine few medium roots; common very fine and fine tubular pores; common distinct clay films in pores and on faces of peds; 20 percent pebbles; 25 percent cobbles, 5 percent stones; neutral (pH 7.2); clear wavy boundary. (8 to 15 cm thick)

Btss1--23 to 51 cm; brown (7.5YR 5/4) very cobbly clay, brown (7.5YR 5/4) moist; strong medium prismatic structure; very hard, very firm, very sticky and very plastic; common very fine and few fine and medium roots; roots are more abundant and flattened along faces of peds; common very fine and few fine tubular pores; many prominent clay films n pores and on faces of peds; few slickensides; 20 percent cobbles, 10 percent stones; neutral (pH 6.7); gradual wavy boundary. (20 to 36 cm thick)

Btss2--51 to 79 cm; light brown (7.5YR 6/4) very stony clay, brown (7.5YR 5/4) moist; moderate medium prismatic structure parting to moderate fine angular blocky; very hard, very firm, very sticky and very plastic; common very fine and few fine and medium roots, roots are more abundant and flattened along faces of peds; common very fine and few fine tubular pores; many prominent and common prominent clay films in pores and on the faces of peds; few slickensides; 20 percent pebbles; 15 percent cobbles, 20 percent stones; neutral (pH 6.8); gradual wavy boundary. (20 to 33 cm thick)

B't1--79 to 107 cm; light brown (7.5YR 6/4) very stony clay, brown (7.5YR 5/4) moist; moderate very fine and fine angular blocky structure; hard, firm, very sticky and very plastic; few very fine and fine roots; common very fine and few fine tubular pores; many distinct clay films in pores and on faces of peds; 20 percent pebbles, 15 percent cobbles, 20 percent stones, 2 percent visible iron and manganese stains on faces of peds and rock fragments; neutral (pH 7.2); clear wavy boundary. (20 to 36 cm thick)

B't2--107 to 117 cm; pink (7.5YR 7/4) very stony clay loam, yellowish brown (10YR 5/4) moist; moderate very fine and fine angular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine roots; few very fine tubular pores; many distinct clay films in pores and on faces of peds; 20 percent pebbles, 15 percent cobbles, 20 percent stones, 5 percent visible iron and manganese stains on faces of peds and rock fragments; slightly alkaline (pH 7.6); gradual wavy boundary. (8 to 23 cm thick)

2BC--117 to 150 cm; pink (7.5YR 7/4) very gravelly sandy loam, brown (7.5YR 4/4) moist; weak thin platy structure; slightly hard, friable; nonsticky and nonplastic; few very fine dead roots; few very fine tubular pores; 30 percent pebbles and 10 percent cobbles; 5 percent visible iron and manganese stains on faces of peds and coarse fragments; slightly alkaline (pH 7.8).

TYPE LOCATION: Custer County, Idaho; approximately 4.8 km northwest of Clayton, Idaho; about 396 meters east and 198 meters south of the northwest corner of section 15, T. 11 N., R. 17 E. Latitude - 44 degrees, 17 minutes, 18 seconds North; Longitude - 114 degrees, 26 minutes, 52 seconds West.

RANGE IN CHARACTERISTICS:

Average annual soil temperature - 3 to 6 degrees C.
Average summer soil temperature - 8 to 10 degrees C.
Base saturation by NH4OAc is over 50 percent throughout.
Clay content in particle-size control section - 40 to 60 percent
Rock fragments - 45 to 65 percent
Depth to argillic - 5 to 23 cm

A horizon
Hue - 7.5YR or 10YR
Value - 4 or 5 dry
Chroma - 2 or 3 dry or moist

BA horizon
Hue - 7.5YR or 10YR
Value - 4 or 5 dry
Chroma - 2 or 3 dry or moist
After mixing the upper 7 inches of the soil, mollic colors are present.
Texture - GRV-CL, CBV-CL
Rock fragments - 40 to 60 percent

Bt, Btss and B't horizons
Hue - 7.5YR or 10YR
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 4 through 6 dry or moist
Texture - CBV-C, STV-C, STV-CL, STX-CL, STX-C, GRV-C, GRV-CL
Clay content - 35 to 60 percent decreasing with depth.
Rock fragments - 45 to 65 percent
Reaction - neutral or slightly alkaline

2BC horizon is absent in some pedons.

COMPETING SERIES: These are the Cluff, Wina, and Yence soils. Cluff soils have an O horizon, and are slightly to very strongly acid. Wina soils are greater than 33 cm to the upper boundary of the argillic horizon, slightly acid throughout, and have an O horizon. Yence soils are slightly to moderately acid in the lower subsoil, have bedrock at 107 cm, and have an average annual precipitation of about 760 millimeters.

GEOGRAPHIC SETTING: Reck soils are on broad ridges and mountain sideslopes. These soils formed in sloe alluvium from quartzite and occur in areas having evidence of mass movement. Slopes are 5 to 35 percent. Elevations are 2075 to 2700 meters. The climate is cold and moist in winter and spring, and cool and dry to moist in summer. The average annual precipitation is 330 to 410 millimeters; average annual temperature is 2 to 4 degrees C.; and the frost-free period is 30 to 60 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Friedman, Goldhill, Lemco, Threedot, and Zeebar soils. Friedman soils are on mountains and are pachic. Goldhill soils are on mountains and foothills and have less than 35 percent rock fragments in the control section. Lemco, Threedot, and Zeebar soils are on mountains and have mollic epipedons.

DRAINAGE AND PERMEABILITY: Well drained. Medium runoff; very slow permeability.

USE AND VEGETATION: Rangeland. Vegetation is mainly low sagebrush, alkali sagebrush, and Idaho fescue.

DISTRIBUTION AND EXTENT: East-central Idaho. These soils are not extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Custer County, Idaho, 1999.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - mollic colors extend to 13 cm.
Argillic horizon - the zone from 13 to 117cm
Vertic - slickensides from 23 to 79 cm
Mollic - mollic colors are present after mixing the upper 18 cm
Xeric soil moisture regime
Particle-size control section - the zone from 13 to 64 cm
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National Cooperative Soil Survey
U.S.A.