LOCATION JUSHRO                  OR

Tentative Series
IRD. JRD/DAL/MPR
02/2025

JUSHRO SERIES

Landscape--Blue and Ochoco Mountains
Landform--plateaus, scablands, escarpments, interfluve
Slope--5 to 30 percent
Parent material--residuum derived from rhyolitic tuff with a minor influence of volcanic ash in the surface
Mean annual precipitation--455 mm
Mean annual air temperature--5 degrees C
Depth class--shallow
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Lithic Mollic Haploxeralfs

TYPICAL PEDON: Jushro very channery ashy sandy loam, juniper/shrub woodland. (Colors are for dry soil unless otherwise noted.)

A--0 to 6 cm; yellowish brown (10YR 5/4) very channery ashy sandy loam, dark yellowish brown (10YR 3/4) moist; strong thin and medium platy structure; slightly hard, friable, nonsticky and nonplastic; many very fine roots; many very fine through coarse interstitial pores; 30 percent channers, 10 percent flagstones; slightly acid (pH 6.2); abrupt smooth boundary

Bw--6 to 15 cm; yellowish brown (10YR 5/4) very flaggy ashy sandy clay loam, dark yellowish brown (10YR 3/4) moist; strong medium platy structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, fine and medium roots; many very fine, fine and medium interstitial pores; 20 percent channers, 20 percent flagstones; slightly acid (pH 6.4); abrubt wavy boundary

2Btq--15 to 36 cm; dark yellowish brown (10YR 4/4) extremely stony clay loam, dark yellowish brown (10YR 4/4) moist; moderate fine angular blocky structure; hard, firm, moderately sticky and moderately plastic; common medium roots in horizontal cracks; few fine interstitial pores; common moderately thick clay films on rock faces; 40 percent flagstones and 40 percent flat stones), silica pendants and coatings on undersides of rock fragments; slightly acid (pH 6.4)

2R--36 cm; rhyolitic tuff bedrock

TYPE LOCATION: Harney County, Oregon; on the 4150-700 road west of Mineral Canyon; NW 1/4 of NW 1/4 of Section 33, T. 20 S., R. 26 E.; latitude 43.7899324, longitude -119.6134169, WGS84 Datum (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--6 to 8 degrees C
Soil moisture--usually moist, dry for 75 to 90 days in summer and early fall
Argillic horizon--8 to 20 cm thick
Depth to lithic contact--20 to 36 cm

Properties of layers influenced by volcanic ash
*Ash influenced layer thickness--10 to 20 cm
*Ammonium oxalate extractable Al + Fe--0.4 to 1.0 percent
*Volcanic glass content--10 to 30 percent

Particle-size Control Section
*Clay content--27 to 35 percent
*Total rock fragment content--45 to 75 percent
*Rock fragment content--rhyolitic tuff, andesite, basalt

A horizon
*Hue--10YR moist or dry
*Value--3 moist, 3 to 5 dry
*Chroma--4 moist or dry
*Fine earth texture--fine sandy loam, sandy loam
*Clay content--8 to 18 percent
*Sand content--50 to 70 percent
*Organic matter content--1 to 4 percent
*Total rock fragments--30 to 60 percent
*Channer content--20 to 30 percent
*Flagstone content--10 to 25 percent
*Stone content--0 to 5 percent
*Reaction content--pH 6.1 to 6.5 (slightly acid)
*Thickness--4 to 10 cm

Bw horizon
*Hue--10YR moist or dry
*Value--3 or 4 moist, 4 or 5 dry
*Chroma--4 or 6 moist or dry
*Fine earth texture--sandy clay loam
*Clay content--20 to 27 percent
*Sand content--45 to 80 percent
*Organic matter content--0.50 to 1.50 percent
*Total rock fragments--30 to 60 percent
*Channer content--10 to 20 percent
*Flagstone content--20 to 30 percent
*Stone content--0 to 10 percent
*Reaction--pH 6.1 to 6.5 (slightly acid)
*Thickness--8 to 15 cm

2Btq horizon
*Hue--10YR moist or dry
*Value--3 or 4 moist, 4 or 5 dry
*Chroma--4 or 6 moist or dry
*Fine earth texture--sandy clay loam, clay loam
*Clay content--27 to 35 percent
*Sand content--35 to 65 percent
*Organic matter content--0.25 to 1 percent
*Total rock fragments--40 to 90 percent
*Channer content--0 to 40 percent
*Flagstone content--20 to 50 percent
*Stone content--20 to 40 percent
*Reaction--pH 6.1 to 6.5 (slightly acid)

COMPETING SERIES:
Avtable--lack volcanic ash influence in upper part; 36 to 50 cm to lithic contact; lacks silica accumulation
Blackspar--lack volcanic ash influence in upper part; dry for 90 to 120 days

GEOGRAPHIC SETTING:
Elevation--1220 to 1980 m
Climate--cold, wet winters and hot, dry summers
Mean annual precipitaiton--380 to 530 mm
Mean annual air temperature--4 to 7 degrees
Frost-free period--90 to 120 days
Lithology--pyroclastic rhyolitic tuffs commonly of the Rattlesnake formation

GEOGRAPHICALLY ASSOCIATED SOILS:
Sintuf--occur on shoulders, plateaus, benches and hillslopes; less than 75 percent base saturation in upper part; greater than 14 cm of volcanic ash influence
Wileyflatt--occur on plateaus and ridges; 50 to 100 cm to lithic contact
Hankins--occur on footslopes, benches, backslopes; greater than 100 cm to restrictive feature; vertic, averages greater than 35 percent clay in control section

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage--well drained
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--High to moderately high

USE AND VEGETATION:
Use--woodland and rangeland habitat, livestock grazing
Potential native vegetation--western juniper, antelope bitterbrush, bluegrass, bluebunch wheatgrass, Idaho fescue
Typical plant associaiton--JUOC/PUTR2/FEID-PSSPS, CJS321, Plant Association and Management Guide for the Ochoco and Southern Blue Mountain Areas

DISTRIBUTION AND EXTENT: Blue and Sevin Devils Mountains; 43C These soils are of minor extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Crook County Area (Ochoco National Forest), Oregon, 2009.

REMARKS:
Diagnostic horizons and features in this pedon:

*Particle size control section--15 to 36 cm
*Ochric epipedon--0 to 6 cm
*Mollic subgroup properties--0 to 16 cm
*Volcanic ash--0 to 15 cm
*Argillic horizon--15 to 36 cm
*Secondary silica accumulation--15 to 36 cm
*Lithologic discontinuity--15 to 36 cm
*Lithic contact--36 cm

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National Cooperative Soil Survey
U.S.A.