LOCATION HASSHOLLOW OR
Established Series
IRD. RJO/DAL/KMS
01/2019
HASSHOLLOW SERIES
Landscape--mountains
Landform--mid slopes of lateral moraines, mountain slopes
Slope--0 to 90 percent
Parent material--thick mantle of volcanic ash over till derived from mixed sources
Mean annual precipitation--about 1320 mm
Mean annual air temperature--about 3 degrees C
Depth class--very deep
Drainage class-well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy-skeletal over loamy-skeletal, amorphic over isotic Alfic Vitricryands
TYPICAL PEDON: Hasshollow stony ashy silt loam in an area of woodland, on a 30-percent, southeast-facing slope at an elevation of 1676 m
Oi--0 to 3 cm; slightly decomposed needles and twigs
A--3 to 15 cm; stony ashy silt loam, brown (10YR 5/3) dry, dark brown (7.5YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine and few medium and coarse roots; common very fine irregular pores; 10 percent gravel, 10 percent cobbles, and 10 percent stones; neutral (pH 7.0); clear wavy boundary
Bw--15 to 46 cm; very stony ashy silt loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak fine and medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots; few very fine irregular pores; 10 percent gravel, 15 percent cobbles, and 15 percent stones; neutral (pH 7.0); abrupt wavy boundary
2Eb--46 to 66 cm; extremely stony silt loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak very fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; common fine and medium and few coarse roots; few fine irregular pores; 20 percent gravel, 20 percent cobbles, and 20 percent stones; moderately acid (pH 5.6); clear wavy boundary
2Btb--66 to 122 cm; extremely stony loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; common fine and few medium roots; few fine tubular pores; few faint clay films on faces of peds; 20 percent gravel, 25 percent cobbles, and 20 percent stones; slightly acid (pH 6.3); gradual smooth boundary
2BCb--122 to 155 cm; extremely stony loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; soft, friable, moderately sticky and slightly plastic; few fine and medium roots; few fine tubular pores; 20 percent gravel, 25 percent cobbles, and 20 percent stones; slightly acid (pH 6.1)
TYPE LOCATION: Wallowa County, Oregon; in the NW1/4SW1/4SW1/4 of section 26, T. 4 S., R. 46 E.; latitude 45.1808567, longitude -117.0428149, datum WGS 84 (coordinates estimated from a point on a hard copy map)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--about 3 to 6 degrees C
Mean summer soil temperature--about 7 to 10 degrees C
Mean winter soil temperature--about 0 to 2 degrees C
Soil moisture--dry 20 to 35 days in summer
Thickness of ash-influenced layers--35 to 50 cm
Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--1.5 to 3.0 percent
*0.02- to 2.0-mm fraction--40 to 60 percent
*Glass content in 0.02- to 2.0-mm fraction--60 to 90 percent
*1/3-bar bulk density--0.65 to 1.00 g/cm3
*Phosphate retention--60 to 90 percent
*15-bar water retention--5 to 12 percent (dried samples)
*8 x Si plus 2 x Fe--5 to 12 percent
Particle-size control section
*Ashy-skeletal upper part--35 to 50 cm thick; 6 to 10 percent clay; 35 to 50 percent rock fragments
*Loamy-skeletal lower part--55 to 65 cm thick; 16 to 20 percent clay; 60 to 70 percent rock fragments
*Rock fragment shape--subrounded to rounded
A horizon
Moist color--7.5YR 2.5/2, 7.5YR 3/2, 7.5YR 3/3, 7.5YR 4/3
Dry color--7.5YR 4/3, 7.5YR 4/4, 7.5YR 5/4, 10YR 5/3
Fine-earth texture--ashy loam, ashy silt loam
Clay content--8 to 10 percent
Sand content--35 to 50 percent
Organic matter content--1.5 to 4.5 percent
Total rock fragment content--20 to 40 percent
Gravel content--5 to 10 percent
Cobble content--5 to 15 percent
Stone content--5 to 20 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--25 to 75 percent
Thickness--5 to 13 cm
Bw horizon
Moist color--7.5YR 3/4, 7.5YR 4/4
Dry color--7.5YR 5/4
Fine-earth texture--ashy silt loam
Clay content--8 to 10 percent
Sand content--35 to 50 percent
Organic matter content--1.0 to 2.5 percent
Total rock fragment content--35 to 50 percent
Gravel content--10 to 15 percent
Cobble content--15 to 20 percent
Stone content--10 to 20 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--45 to 75 percent
Thickness--30 to 45 cm
2Eb horizon
Moist color--7.5YR 3/3, 7.5YR 3/4
Dry color--7.5YR 4/4, 7.5YR 5/4
Fine-earth texture--silt loam, loam
Clay content--12 to 18 percent
Sand content--25 to 40 percent
Organic matter content--0.5 to 2.0 percent
Total rock fragment content--55 to 70 percent
Gravel content--15 to 20 percent
Cobble content--20 to 30 percent
Stone content--15 to 25 percent
Reaction--5.6 to 7.3
Base saturation (sum of bases)--70 to 85 percent
Thickness--15 to 25 cm
2Btb horizon
Moist color--7.5YR 3/3, 7.5YR 3/4, 7.5YR 4/3, 7.5YR 4/4
Dry color--7.5YR 4/4, 7.5YR 5/4
Fine-earth texture--silt loam, loam
Clay content--15 to 23 percent
Sand content--30 to 35 percent
Organic matter content--0.5 to 2.0 percent
Total rock fragment content--65 to 70 percent
Gravel content--15 to 20 percent
Cobble content--20 to 30 percent
Stone content--15 to 25 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--70 to 85 percent
Thickness--35 to 75 cm
2BCb horizon
Moist color--7.5YR 3/3, 7.5YR 3/4, 10YR 3/3
Dry color--7.5YR 5/4, 10YR 4/4
Fine-earth texture--silt loam, loam
Clay content--15 to 18 percent
Sand content--30 to 35 percent
Organic matter content--0.3 to 1.5 percent
Total rock fragment content--65 to 75 percent
Gravel content--20 to 25 percent
Cobble content--20 to 30 percent
Stone content--15 to 25 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--70 to 85 percent
COMPETING SERIES:
Vester--mountain side slopes; angular and subrounded rock fragments
Wasku--less than 30 percent glass and sandy loam texture in ash-influenced layers
GEOGRAPHIC SETTING:
Elevation--1560 to 2410 m
Climate--cold, wet winters; warm, dry summers
Mean annual precipitation--700 to 1700 mm
Mean annual temperature--1 to 5 degrees C
Frost-free period--20 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bucketlake-in areas of till derived dominantly from granite; less than 35 percent rock fragments in ash mantle
Ducklake--on mid to lower backslopes of lateral moraines; 100 to 150 cm to densic layer; less than 35 percent rock fragments in ash mantle
Tyeecreek--on convex and steeper south-facing slopes; less than 35 percent rock fragments in ash mantle
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderate
USE AND VEGETATION:
Use--watershed, wildlife habitat, timber production, livestock grazing, recreation
Native vegetation--lodgepole pine, Engelmann spruce, subalpine fir, grand fir, western larch, Douglas-fir, big huckleberry, grouse huckleberry, heartleaf arnica, darkwoods violet, prince's pine, western rattlesnake plantain, pinegrass, birchleaf spirea, Utah honeysuckle, sweetcicely, sidebells wintergreen, currant, western meadow-rue, Sitka alder
Plant association--PICO(ABLA)/VAME, ABLA/VAME, ABLA/LIBOL2
DISTRIBUTION AND EXTENT: Blue Mountains of northeastern Oregon; MLRA 43C; 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
*Ochric epipedon
*Cambic horizon--zone from 5 to 46 cm
*Argillic horizon--zone from 66 to 122 cm
*Volcanic glass--zone from 3 to 46 cm
*Andic soil properties--zone from 3 to 46 cm
*Particle-size control section--zone from 3 to 104 cm; ashy in zone from 3 to 15 cm; ashy-skeletal in zone from 16 to 46 cm; loamy-skeletal in zone from 46 to 104 cm
National Cooperative Soil Survey
U.S.A.