LOCATION EASTPINE OR
Established Series
Rev. AEK/RJO/DAL
03/2013
EASTPINE SERIES
The Eastpine series consists of moderately deep, well drained soils on ridges, shoulders and backslopes of mountains. Eastpine soils are formed in colluvial and residual material derived from metasedimentary rocks with an influence of volcanic ash. Slopes are 15 to 90 percent. The mean annual precipitation is about 30 inches and the mean annual temperature is about 42 degrees F.
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Haploxerolls
TYPICAL PEDON: Eastpine very cobbly ashy loam - woodland, on a 55 percent planar southeast-facing slope at an elevation of 4,445 feet. (Colors are for moist soil unless otherwise noted and andic soil material are apparent field textures.)
Oi--1 to 0 inches; slightly decomposed leaves and twigs.
A--0 to 11 inches; very dark grayish brown (10YR 3/2) very cobbly ashy loam, dark grayish brown (10YR 4/2) dry; moderate fine granular structure; soft, friable, slightly sticky and nonplastic; many very fine, fine and medium and common coarse roots; common fine and few medium irregular pores; 20 percent gravel, 25 percent cobbles and 15 percent stones; slightly acid (pH 6.5); clear wavy boundary. (10 to 14 inches thick)
Bw1--11 to 25 inches; yellowish brown (10YR 5/4) extremely cobbly sandy loam, light yellowish brown (10YR 6/4) dry; weak very fine and fine subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; common very fine, fine, and medium and few coarse roots; common fine irregular pores; 25 percent gravel, 30 percent cobbles and 15 percent stones; moderately acid (pH 6.0); gradual smooth boundary.
Bw2--25 to 36 inches; yellowish brown (10YR 5/4) extremely stony sandy loam, light yellowish brown (10YR 6/4) dry; weak very fine subangular blocky structure; slightly hard, friable, sticky and slightly plastic; common fine and few medium roots; common fine and few medium irregular pores; 30 percent gravel, 30 percent cobbles and 20 percent stones; moderately acid (pH 6.0); abrupt irregular boundary. (Combined thickness of the Bw horizon is 10 to 35 inches)
R--36 inches; metasedimentary bedrock
TYPE LOCATION: Baker County, Oregon, about 1060 feet east and 100 feet north of the southwest corner of Section 34, T. 6 S., R. 46 E. (Latitude 44 degrees, 59 minutes, 39 seconds N., Longitude 117 degrees, 4 minutes, 36 seconds W. USGS Halfway Quadrangle.)
RANGE IN CHARACTERISTICS:
Soil moisture - usually moist but are dry for 45 to 60 consecutive days following the summer solstice
Mean annual soil temperature - 41 to 46 degrees F.
Particle-size control section - 10 to 18 percent clay and 55 to 80 percent rock fragments
Depth to bedrock - 20 to 40 inches
Volcanic ash influence - 7 to 14 inches thick
Acid-oxalate extractable aluminum plus one-half iron - 0.5 to 1.0 percent
Phosphate retention - 45 to 55 percent
Glass content - 5 to 20 percent
Moist bulk density - 0.75 to 0.95 g/cc
A horizon
hue - 10YR or 7.5YR
Value - 2 or 3 moist, 4 or 5 dry
Chroma - 2 or 3 moist and dry
Texture - CBV- ashy L
Rock fragments - 35 to 55 percent total with 10 to 25 percent gravel, 5 to 25 percent cobbles, and 5 to 10 percent stones
Clay - 5 to 15 percent
Reaction - 6.1 to 7.3
Bw horizon
hue - 10YR, 7.5YR, or 5YR
Value - 4 or 5 moist, 4 to 6 dry
Chroma - 3 or 4 moist, 4 to 6 dry. Texture - CBV-SL, CBV-L, CBX-SL, CBX-L, STX-SL, GRX-L
Rock fragments - 55 to 80 percent total with 20 to 40 percent gravel, 15 to 35 percent cobbles, and 10 to 25 percent stones
Clay -10 to 18 percent
Reaction - 5.6 to 7.3
COMPETING SERIES: These are the
Bearspring,
Cassal,
Cherrycreek,
Dogtown,
Egyptcreek,
Fredonyer,
Longs,
Midpeak,
Mineral,
Peahke,
Piersonte,
Scoap,
Shalrock,
Shilling,
Umatilla, and
Yellcreek soils.
Bearspring soils - are greater than 60 inches to bedrock; has 30 to 50 percent granitic rock fragments in the particle-size control section; dry for 60 to 75 consecutive days
Cassal soils - 20 to 40 inches to densic contact; redox features at 30 to 45 inches; dry for 60 to 75 consecutive days
Cherrycreek soils - 40 to 60 inches to lithic contact (basalt); have a mollic epipedon 20 to 35 inches thick; dry for 60 to 75 consecutive days
Dogtown soils - 40 to over 60 inches to a paralithic contact
Egyptcreek soils - 20 to 40 inches to lithic contact (welded tuff); dry 75 to 90 consecutive days
Fredonyer soils - 20 to 40 inches to lithic contact (andesite); dry greater than 75 consecutive days
Longs soils - 40 to 60 inches to lithic contact (basalt); pscs has 18 to 27 percent clay
Midpeak soils - have a moist bulk density of 1.00 to 1.20 g/cc in the upper 7 to 20 inches of the solum; dry for 60 to 75 consecutive days
Peahke soils - have 18 to 30 percent clay and 60 to 75 percent channer shaped rock fragments in the particle-size control section; 20 to 30 percent volcanic glass in the upper 7 to 14 inches of the solum
Piersonte soils - pscs dominated by 50 to 70 % rock fragments of shale origin; dry 60 to 90 consecutive days
Scoap soils - are greater than 60 inches to bedrock; mollic epipedon 20 to 30 inches thick; dry for 60 to 75 consecutive days
Shalrock soils - have 25 to 50 percent medium and coarse sand in the particle-size control section; a moist bulk density of 1.0 to 1.2 g/cc in the upper 7 to 14 inches of the solum; dry for 60 to 75 consecutive days
Shilling soils - greater than 60 inches deep to bedrock; pscs has greater than 18 % clay
Umatilla soils - greater than 60 inches deep to bedrock; pscs has 25 to 35 percent clay; dry for 60 to 80 consecutive days
Yellcreek soils - greater than 60 inches deep to bedrock; dry for 60 to 75 consecutive days
GEOGRAPHIC SETTING: Eastpine soils occur on ridges, shoulders and backslopes of mountains. Elevations are 3,600 to 6,200 feet. Slopes are 15 to 90 percent. The soil is formed in colluvial and residual material derived from metasedimentary rocks with an influence of volcanic ash. The climate is characterized by cold, wet winters and warm, dry summers. The mean annual precipitation is 18 to 40 inches. The mean annual air temperature is 39 to 44 degrees F. The frost-free period is 45 to 85 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Analulu, and
Vogel (T). Analulu soils have an orchic epipon. Conundrum soils have an argillic horizon and are not skeletal.
Ironside soils lack andic properties.
Kettlecreek soils lack andic properties and are deep. Sparabutte soils lack andic properties, have an argillic horizon, are not skeletal in the particle-size control section and are grater than 18 percent clay. Vogel soils are shallow and associated with convex mid to upper slopes with sparse vegetation. Weatherspoon soils have an agrillic horizon and are deep.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: These soils are primarily for timber production but are also used for watershed and recreation. The native vegetation is grand fir, Douglas fir, western larch, ponderosa pine, lodgepole pine, Rocky Mountain maple, big huckleberry, twin flower, heartleaf arnica, starry Solomon's seal, mitella, thimbleberry, Hooker's fairybells, spiraea, pinegrass, elk sedge and broadpetal strawberry.
DISTRIBUTION AND EXTENT: Northeastern Oregon; MLRA 9. The soils are of limited extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wallow County, Oregon 1998. The source of the name is a stream.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from 0 to 11 inches (A horizon)
Cambic horizon - from 11 to 36 inches (Bw1 and Bw2 horizons)
Vitrandic feature - from 0 to 11 inches (A horizon)
Particle-size control section - from 10 to 36 inches (A, Bw1, and Bw2 horizons)
The dominant plant association is ABGR/ACGL; others may include ABGR/SPBE and ABGR/CARU
National Cooperative Soil Survey
U.S.A.