LOCATION HUSS                    OR

Tentative Series
DRJ/JGM/KMS
01/2017

HUSS SERIES

Landscape--western Cascade Mountains
Landform--glacially influenced structural benches
Slope--30 to 60 percent
Parent material--colluvium derived from igneous rock mixed with till and volcanic ash throughout
Mean annual precipitation--about 2100 mm
Mean annual air temperature--about 7 degrees C
Depth class--moderately deep to hard igneous extrusive rock
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Medial-skeletal, amorphic, frigid Typic Hapludands

TYPICAL PEDON: Huss very gravelly medial silt loam on an east-facing, 35-percent, forested slope at an elevation of 1200 m (The soil was moist throughout when described on June 4, 2013.)

Oi--0 to 2 cm; slightly decomposed plant material; abrupt wavy boundary

A--2 to 27 cm; very gravelly medial silt loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; moderate fine granular structure; very friable, slightly sticky and nonplastic; many very fine, common medium and coarse, and few fine roots; many very fine and fine irregular pores and common medium and coarse tubular pores; 25 percent basalt gravel and 15 percent basalt cobbles; strongly acid (pH 5.3); clear wavy boundary

AB--27 to 39 cm; very gravelly medial silt loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate fine granular structure; very friable, slightly sticky and nonplastic; many very fine, common medium, and few fine and coarse roots; many very fine dendritic tubular and irregular pores and common fine, medium, and coarse tubular pores; 25 percent basalt gravel and 15 percent basalt cobbles; strongly acid (pH 5.5); clear wavy boundary

Bw--39 to 78 cm; extremely cobbly medial silt loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; weak medium subangular blocky structure; friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; common very fine and fine dendritic tubular pores and common very fine and fine and few medium tubular pores; 35 percent basalt gravel, 30 percent basalt cobbles, and 10 percent basalt stones; moderately acid (pH 5.8); clear wavy boundary

2R--78 cm; highly fractured basalt

TYPE LOCATION: Linn County, Oregon, about 36 km east of Sweet Home and 10 km northeast of the junction of Upper Soda Fork Road and OR Highway 20; about 325 m south and 520 m east of the northwest corner of section 5, T. 13 S., R. 5 E., Willamette Meridian; latitude 44.4721944, longitude -122.2387222, datum WGS 84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Dry days--less than 45 consecutive days between depths of 10 and 30 cm following summer solstice
Mean annual soil temperature--5 to 7 degrees C
Thickness of umbric epipedon--25 to 50 cm
Depth to bedrock--50 to 100 cm below mineral soil surface
Reaction--5.0 to 6.0 throughout all mineral horizons
Thickness of andic soil properties--50 to 100 cm (below mineral soil surface)

Estimated properties of layers with andic soil properties
*1/3-bar bulk density--0.6 to 0.9 g/cm3
*Phosphate retention--greater than 85 percent
*Ammonium oxalate extractable Al + 1/2 Fe--2 to 4 percent
*15-bar water retention--30 to 70 percent (undried samples), greater than 15 percent (dried samples)
*0.02- to 2.0-mm fraction--greater than 30 percent
*Volcanic glass content in 0.02- to 2.0-mm fraction--5 to 30 percent

Particle-size control section
*Clay content--18 to 27 percent
*Total fragment content--35 to 60 percent

O horizon
*Thickness--1 to 6 cm

A horizon, or A1 horizon (where present)
*Hue--7.5YR, 10YR
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--2 or 3 moist or dry
*Clay content--15 to 20 percent
*Sand content--30 to 50 percent
*Total fragment content--35 to 50 percent
*Gravel content--25 to 45 percent
*Cobble content--5 to 15 percent
*Stone content--0 to 5 percent
*Thickness--20 to 36 cm

AB horizon, or A2 horizon (where present)
*Hue--7.5YR, 10YR
*Value--2.5 or 3 moist, 4 or 5 dry
*Chroma--2 to 4 moist, 3 or 4 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--20 to 35 percent
*Total fragment content--35 to 60 percent
*Gravel content--25 to 55 percent
*Cobble content--5 to 20 percent
*Stone content--0 to 5 percent
*Thickness--0 to 36 cm

Bw horizon
*Hue--7.5YR, 10YR
*Value--3 to 5 moist, 5 to 7 dry
*Chroma--3 or 4 moist, 3 to 6 dry
*Fine-earth texture--medial silt loam, medial loam
*Clay content--18 to 27 percent
*Sand content--15 to 30 percent
*Total fragment content--50 to 75 percent
*Gravel content--25 to 55 percent
*Cobble content--10 to 40 percent
*Stone content--0 to 20 percent
*Thickness--30 to 50 cm

COMPETING SERIES:
Kyotesue--ochric epipedon; greater than 150 cm deep to bedrock
Coolcamp--greater than 150 cm deep to bedrock

GEOGRAPHIC SETTING:
Elevation--800 to 1200 m
Climate--warm, dry summers; cool, wet winters
Mean annual precipitation--1900 to 2300 mm
Mean annual air temperature--6 to 8 degrees C
Frost-free period--90 to 120 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Menagerie--less than 35 percent rock fragments; greater than 150 cm deep to bedrock; in linear and slightly concave positions
Coolcamp--greater than 150 cm deep to bedrock; in linear and slightly convex positions

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

USE AND VEGETATION:
Use--watershed, recreation, wildlife habitat, timber production
Potential natural vegetation--Douglas-fir, western hemlock, Pacific rhododendron, Cascade Oregon grape, salal, white-veined pyrola, red huckleberry, beargrass, snow raspberry, twinflower

DISTRIBUTION AND EXTENT: Central western Cascade Mountains, Oregon; MLRA 3; small extent

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

SERIES PROPOSED: Willamette National Forest, Linn County, Oregon; name from Huss Ridge

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 2 to 78 cm
*Umbric epipedon--zone from 2 to 27 cm
*Cambic horizon--zone from 27 to 78 cm
*Andic soil properties--zone from 2 to 78 cm
*Volcanic glass--zone from 2 to 78 cm
*Depth to lithic contact--78 cm

06/2016--Assumed to meet criteria 2 (no ash required) for andic soil properties, in the 12th edition of Keys to Soil Taxonomy. It is also assumed that enough ash is present for the soils to meet criteria 3. Additional lab data is needed to confirm the degree of ash influence.

ADDITIONAL DATA: Type location user site ID--2013OR043001

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National Cooperative Soil Survey
U.S.A.