LOCATION PUDERBAUGH              OR

Established Series
Rev. RLW/KMS
11/2018

PUDERBAUGH SERIES

Landscape--mountains
Landform--mountain slopes
Slope--15 to 90 percent
Parent material--colluvium derived from limestone and a minor influence of volcanic ash in the upper part
Mean annual precipitation--about 350 mm
Mean annual air temperature--about 7 degrees C
Depth class--moderately deep to lithic bedrock
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Argixerolls

TYPICAL PEDON: Puderbaugh gravelly ashy sandy loam in an area of rangeland, on a slope of 29 percent at an elevation of 997 m

A--0 to 10 cm; gravelly ashy sandy loam, reddish brown (5YR 4/3) dry, dark reddish brown (5YR 3/3) moist and rubbed; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots throughout; very fine interstitial pores; 20 percent gravel and 5 percent cobbles; neutral (pH 7.1); clear smooth boundary

2Bt--10 to 36 cm; very cobbly sandy clay loam, reddish brown (5YR 4/3) dry, dark reddish brown (5YR 3/3) moist; moderate fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine, fine, and medium roots throughout; few very fine interstitial and tubular pores; 15 percent faint clay films on all faces of peds; 20 percent gravel and 15 percent cobbles; neutral (pH 6.8); clear smooth boundary

2BC--36 to 58 cm; very cobbly sandy clay loam, reddish brown (5YR 4/3) dry, dark reddish brown (5YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fine roots throughout; few very fine interstitial pores; 20 percent gravel and 20 percent cobbles; neutral (pH 6.8)

2R--58 cm; limestone

TYPE LOCATION: Wallowa County, Oregon; about 805 m north and 255 m east of the southwest corner of section 24, T. 5 S., R. 48 E., latitude 45.1154320, longitude -116.7969398, datum WGS 84 (coordinates from unknown source)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 8 degrees C
Soil moisture--dry 60 to 90 consecutive days following summer solstice
Depth to lithic contact--50 to 100 cm
Thickness of mollic epipedon--50 to 100 cm
Thickness of layers influenced by volcanic ash--5 to 18 cm

Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--0.3 to 0.5 percent
*0.02- to 2.0-mm fraction--more than 30 percent
*Volcanic glass in 0.02- to 2.0-mm fraction--5 to 15 percent

Particle-size control section
*Clay content--25 to 35 percent
*Total rock fragment content--more than 35 percent

A horizon
Fine-earth texture--ashy sandy loam
Clay content--15 to 20 percent
Sand content--45 to 65 percent
Organic matter content--2 to 5 percent
Total rock fragment content--15 to 35 percent
Gravel content--15 to 25 percent
Cobble content--0 to 10 percent
Reaction--6.6 to 7.3

2Bt and 2BC horizons
Clay content--27 to 35 percent
Sand content--45 to 60 percent
Organic matter content--1 to 3 percent
Total rock fragment content--35 to 60 percent
Gravel content--15 to 35 percent
Cobble content--10 to 25 percent
Reaction--6.6 to 7.3

COMPETING SERIES:
Bullump, Camelback, Erig--lithic contact at a depth of more than 100 cm
Bullvaro, Chrisflat, Dogbed, Dooh, Krenka, Murain, Nutval, Snyderville, Softback, Softscrabble, Vetagrande--no lithic contact within a depth of 150 cm
Burchflat, Vipont--no volcanic ash in upper part
Leroman--paralithic contact at a depth of 50 to 100 cm
Lockgate--paralithic contact at a depth of more than 100 cm
Staberg--paralithic contact at a depth of 100 to 150 cm

GEOGRAPHIC SETTING:
Elevation--730 to 1030 m
Climate--cool, wet winters; hot, dry summers
Mean annual precipitation--300 to 490 mm
Mean annual temperature--5 to 7 degrees C
Frost-free season--60 to 150 days

GEOGRAPHICALLY ASSOCIATED SOILS: None given

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Kstat)--moderately high

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Potential native vegetation--Idaho fescue, bluebunch wheatgrass, Sandberg bluegrass, brome, Wyeth buckwheat, prairie Junegrass, lupine, phlox, serrate balsamroot

DISTRIBUTION AND EXTENT: Hells Canyon National Recreation Area in eastern Oregon; MLRA 9; small extent

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

SERIES ESTABLISHED: Wallowa-Whitman National Forest, Oregon; 2018

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 58 cm
*Argillic horizon--zone from 10 to 58 cm
*Volcanic glass--zone from the surface to a depth of 10 cm (meets Vitrandic criteria, except for thickness)
*Depth to lithologic discontinuity--10 cm
*Particle-size control section--10 to 58 cm

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National Cooperative Soil Survey
U.S.A.