LOCATION UPTMOR                  ID

Established Series
Rev. RJB/BDG/EMM
10/2013

UPTMOR SERIES

The Uptmor series consists of deep and very deep, well drained soils that formed in loess and material weathered from basalt, andesite, or greenstone. Uptmor soils are on high plateaus, canyon benches, and foothills of mountains and have slopes of 3 to 40 percent. Saturated hydraulic conductivity is moderately low. The average annual precipitation is about 27 inches and the average annual temperature is about 42 degrees F.

TAXONOMIC CLASS: Fine, smectitic, frigid Ultic Argixerolls

TYPICAL PEDON: Uptmor silt loam - on a 9 percent south-facing slope at 4,400 feet elevation in forest. When described on August 16, 1962 the profile was moist. (Colors are for dry soil unless otherwise noted.)

Oe--0.5 inch to 0; slightly to moderately decomposed organic material.

A1--0 to 2 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; moderate thin and medium platy and moderate fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and common fine and medium roots; many very fine irregular pores; slightly acid (pH 6.4); abrupt smooth boundary. (2 to 5 inches thick)

A2--2 to 4 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; weak medium platy structure parting to weak very fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine and medium roots; common very fine tubular pores; peds thinly coated with very fine sand and silt grains; moderately acid (pH 6.0); clear wavy boundary. (2 to 6 inches thick)

BAt--4 to 12 inches; brown (10YR 4/3) light silty clay loam, dark brown (10YR 3/3) moist; moderate medium prismatic structure parting to moderate fine and medium subangular blocky; very hard, friable, slightly sticky and plastic; common very fine and fine and few medium and coarse roots; many very fine, common fine and few medium tubular pores; many faint clay films on faces of peds and in pores; peds thinly coated with very fine sand and silt grains; common krotovinas filled with A1 material; slightly acid (pH 6.2); gradual wavy boundary. (0 to 8 inches thick)

Bt1--12 to 22 inches; light brown (7.5YR 6/3) silty clay loam, brown (7.5YR 4/3) moist; moderate medium prismatic structure parting to weak medium subangular blocky; very hard, friable, slightly sticky and plastic; common very fine and few fine and medium roots; many very fine and few fine and medium tubular pores; many faint clay films on faces of peds and in pores; peds thinly coated with very fine sand and silt grains; common fine iron-manganese concretions; few krotovina filled with A1 material; moderately acid (pH 5.8); clear wavy boundary. (7 to 13 inches thick)

Bt2--22 to 25 inches; brown (7.5YR 4/4) light silty clay, brown (7.5YR 4/3) moist; strong fine and very fine angular blocky structure; very hard, friable, very sticky and very plastic; common very fine and few fine and medium roots; many very fine and few fine tubular pores; continuous prominent clay films on faces of peds and in pores; light brown (7.5YR 6/3) coatings on peds, brown (7.5YR 4/3) moist; peds thinly coated with silt and very fine sand grains; common fine iron-manganese concretions; about 5 percent weathered greenstone gravel and cobbles; moderately acid (pH 6.0); clear wavy boundary. (2 to 7 inches thick)

Bt3--25 to 46 inches; strong brown (7.5YR 4/6) cobbly silty clay, reddish brown (5YR 4/4) moist; strong very fine and fine angular blocky structure; very hard, firm, very sticky and very plastic; common very fine and few fine and medium roots; common very fine and few fine tubular pores; continuous prominent clay films on faces of peds and in pores; strong brown (7.5YR 4/6) coatings on peds, brown (7.5YR 4/4) moist; some slickensides; common fine iron-manganese concretions; about 20 percent weathered gravel, cobbles, and stones of greenstone; neutral (pH 6.6); clear wavy boundary. (10 to 25 inches thick)

C--46 to 61 inches; brownish yellow (10YR 6/6) very gravelly clay loam, dark yellowish brown (10YR 4/4) moist; weak medium subangular blocky structure; very hard, friable, sticky and plastic; few fine roots; about 25 percent gravel and 10 percent cobbles; neutral (pH 7.2).

TYPE LOCATION: Idaho County, Idaho; about 7 miles west of Cottonwood; about 2,520 feet north and 1,820 feet east of the southwest corner of section 6, T. 31 N., R. 1 W. Latitude - 46 degrees, 03 minutes, 20 seconds North; Longitude - 116 degrees, 30 minutes, 23 seconds West. USGS Westlake quadrangle.

RANGE IN CHARACTERISTICS:

Thickness of mollic epipedon - 10 to 19 inches
Depth to argillic horizon - 12 to 24 inches
Base saturation - less than 75 percent in all parts of the upper 30 inches
Thickness of solum and depth to basalt, andesite, or greenstone - 40 to 60 inches or more
Many pedons have gravel, cobbles, and stones that increase with increasing depth; however, the maximum content does not exceed 30 to 35 percent.
Days dry, moisture control section - 45 to 70
Average summer soil temperature - 59 to 63 degrees F
Average annual soil temperature - 43 to 47 degrees F

A horizon
Hue - 7.5YR or 10YR
Value - 3 or 4 dry, 2 or 3 moist
Chroma - 1 or 2, dry or moist
Clay content - 20 to 27 percent
Rock fragments - 0 to 12 percent gravel, 0 to 3 percent cobbles, 0 to 12 percent total rock fragment content
Reaction - 5.6 to 6.5

Bt horizons
Hue - 10YR, 7.5YR or 5YR, but predominantly 7.5YR or 5YR
Value - 4 to 6 dry, 3 or 4 moist
Chroma - 3 to 6, dry or moist
Texture - clay, silty clay, silty clay loam
Clay content - 30 to 60 percent, averages 35 to 60 percent in upper 20 inches
Reaction - 5.6 to 7.3

COMPETING SERIES:
Donner soils - are moderately deep to weathered andesite or sandstone
Starhope soils - are moderately deep to andesite, latite, tuff, or rhyolite

GEOGRAPHIC SETTING: Uptmor soils are on undulating to steep high plateaus, canyon benches, and mountain foot slopes. Slopes range from 3 to 40 percent. The soils formed in loess and residuum weathered from Columbia River basalt or andesite or greenstone of the Seven Devils volcanics. Elevations range from 1,700 to 5,000 feet (518 to 1524 meters). The climate is subhumid with an average annual precipitation of 24 to 30 inches (610 to 760 mm). Average frost free season (32 degrees F.) is 80 to 130 days. Average annual temperature is 41 to 46 degrees F.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Boles, Suloaf and Telcher soils. Boles soils have albic horizons and are on broad summits. Suloaf soils have fine-loamy argillic horizons and Telcher soils have ochric epipedons, both soils are on similar landscape positions as Uptmor.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Uptmor soils are mainly used for timber and grazing. Some areas have been cleared to raise hay, pasture, wheat, and barley. Native vegetation is mainly Douglas-fir, ponderosa pine, mallow ninebark, elk sedge, common snowberry, heartleaf arnica, creambush oceanspray, rose, pine reedgrass, and white spirea.

DISTRIBUTION AND EXTENT: Northern Idaho. The series is moderately extensive. MLRAs 9 and 43A.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Idaho County, Idaho, 1976.

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

Mollic epipedon - The zone from the surface to 12 inches (A1, A2, and BAt horizons).

Argillic horizon - The zone from 12 to 46 inches (Bt1, Bt2, and Bt3 horizons).

Particle-size control section - The zone from 12 to 32 inches (Bt1, Bt2, and part of the Bt3 horizons).

The deep phase is mapped in Lewis and Nez Perce Counties.

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National Cooperative Soil Survey
U.S.A.