LOCATION SEEMORE ID

Established Series
IRD: WGH/TDT
09/2018

SEEMORE SERIES

The Seemore series consists of very deep, poorly drained soils formed in mixed alluvium with loess influence. Seemore soils are on fan remnants, stream terraces and flood plains and have slopes of 0 to 4 percent. The mean annual precipitation is about 580 mm and the mean annual air temperature is about 3.3 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive Cumulic Cryaquolls

TYPICAL PEDON: Seemore silt loam on a stream terrace with a 2 percent slope at an elevation of 1,972 meters. (Colors are for dry soil unless otherwise noted.)

A--0 to 18 cm; dark grayish brown (10YR 4/2) clay loam, very dark brown (10YR 2/2) moist; strong fine and medium granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and common fine and medium roots; common very fine tubular pores; moderately acid (pH 5.6); clear wavy boundary. (15 to 50 cm thick)

Bt1--18 to 43 cm; dark grayish brown (10YR 4/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; weak coarse prismatic structure parting to moderate coarse subangular blocky; hard, firm, very sticky and very plastic; many very fine and common fine and medium roots; common very fine and fine, and medium tubular pores; common fine prominent strong brown (7.5YR 4/6) iron masses; few prominent continuous sand coats and common discontinuous faint clay films bridging on all faces of peds; slightly acid (pH 6.3); clear wavy boundary.

Bt2--43 to 65 cm; dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; slightly hard, firm, moderately sticky and very plastic; common very fine and fine and few medium roots; common very fine and medium tubular pores; common fine prominent strong brown (7.5YR 4/6) iron masses; few prominent continuous sand coats and common discontinuous faint clay films bridging on all faces of peds; slightly acid (pH 6.3); gradual wavy boundary.

Bt3--65 to 99 cm; brown (10YR 4/3) clay loam, very dark grayish brown (10YR 3/2) moist; weak medium and coarse subangular blocky structure; hard, firm, very sticky and very plastic; common very fine, fine and medium roots; common very fine and fine tubular pores; common fine prominent strong brown (7.5YR 4/6) iron masses; few discontinuous faint clay films bridging on all faces of peds; slightly acid (pH 6.4); clear wavy boundary. (Combine thickness of the Bt horizons is 18 to 99 cm thick)

Ab--99 to 114 cm; brown (10YR 4/3) clay loam, very dark gray (10YR 3/1) moist; strong medium subangular blocky structure; very hard, very firm, very sticky and very plastic; common very fine roots; common very fine and fine tubular pores; common fine prominent strong brown (7.5YR 4/6) iron masses; common discontinuous faint clay films bridging on all faces of peds; slightly acid (pH 6.5); clear wavy boundary. (0 to 15 cm thick)

Btb--114 to 154 cm; brown (10YR 4/3) clay loam, very dark grayish brown (10YR 3/2) moist; moderate coarse platy structure parting to moderate medium subangular blocky; extremely hard, very firm, moderately sticky and very plastic; few very fine roots; common very fine and fine tubular pores; common fine prominent strong brown (7.5YR 4/6) iron masses; few prominent continuous sand coats and common discontinuous faint clay films bridging on all faces of peds; neutral (pH 6.8).

TYPE LOCATION: Clark County, Idaho; about 9.7 km east and 4.2 km north of Kilgore, Idaho; about 1420 meters north and 487 meters east of the southwest corner of section 20, T.13 N., R.40 E.; Antelope Valley USGS topographic quadrangle; latitude 44 degrees, 26 minutes, and 20.1 seconds N. and longitude 111 degrees, 46 minutes, 22.6 seconds W., NAD83.

RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 50 to 154 cm
Depth to redoximorphic features (iron concentrations/depletions): 15 to 50 cm
Depth to buried soil: 38 to 114 cm
Particle-size control section rock fragments (weighted average): 0 to 30 percent
Particle size control section total clay: 26 to 35 percent
Mean annual soil temperature: 2.8 to 4.4 degrees C.
Mean summer soil temperature: 11.1 to 12.8 degrees C.

A horizon
Value: 4 or 5 dry, 2 to 4 moist
Chroma: 2 or 3 dry or moist

Bt horizon
Value: 3 to 6 dry, 4 to 6 moist
Chroma: 2 to 4 dry or moist
Texture: SICL, CL or SCL

Ab horizon, when present
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 or 3 dry, 1 to 4 moist
Texture: CL or SCL

Btb horizon, when present
Value: 4 or 5 dry, 2 to 4 moist
Chroma: 3 or 4 dry, 2 or 3 moist
Texture: CL, SCL, GR-SCL

Some pedons have a 2C horizon, when present
Hue: 10YR or 2.5Y dry or moist
Value: 4 to 6 dry, 2 to 4 moist
Chroma: 2 to 4 dry, 2 to 6 moist
Textures: SCL, SC or GRX-SCL

COMPETING SERIES: These are the Almont, Regulus, Venable, and Wiskisprings series. Almont soils have a mollic epipedon from 20 to 50 cm thick. Regulus soild have sandy-skeletal material at depths of 100 to 150 cm. Venable soils occur is a climatic area having udic soil moisture regimes. Wiskisprings soils have 18 to 25 precent clay in the particle-size control section.

GEOGRAPHIC SETTING:
Landscape: Mountains
Landform: fan remnants, stream terraces and flood plains
Elevation: 1,890 to 2,012 meters
Slope: 0 to 4 percent
Parent material: mixed alluvium with loess influence
Mean annual air temperature: 2.2 to 4.4 degrees C.
Mean annual precipitation: 508 to 635 mm
Frost free period: 40 to 60 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sudpeak, Slights, Fourme, and Longway (T) soils. Sudpeak soils are moderately well drained and have 35 to 45 percent clay in the particle-size control section and are located on stream terraces and floodplains. Slights soils are well drained, have 35 to 50 percent clay in the particle-size control section, and are located on stream terraces and fan remnants. Fourme soils are loamy-skeletal and located on fan remnants and stream terraces. Longway soils are well drained and are located on stream terraces.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Poorly drained
Runoff: Low
Saturated hydraulic conductivity: Moderately high

USE AND VEGETATION:
Major uses: rangeland and wildlife habitat.
Dominant native vegetation: silver sagebrush, shrubby cinquefoil, tufted hairgrass, slender wheatgrass, sedges.

DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho, MLRA 13
Extent: The series is not extensive

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Clark County Area, Idaho, 2018.

REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from 0 to 154 cm
Redoximorphic features (iron concentrations/depletions): at a depth of 18 cm
Particle-size control section: from 25 to 100 cm
Soil temperature regime: cryic
Soil moisture regime: aquic

ADDITIONAL DATA: Lab data from NSSL, Lincoln, NE: This pedon sampled as S09ID033003

National Cooperative Soil Survey
U.S.A.