LOCATION RYESPUR                 OR

Tentative Series
Rev. JSC/TDT
02/2022

RYESPUR SERIES

Landscape--Lava Plateau, Mountain
Landform--volcanic fields, gorges, canyons
Slope--1 to 60 percent
Parent material--colluvium from volcanic rock and tephra over colluvium and residuum weathered from volcanic rock
Mean annual precipitation--about 760 mm
Mean annual air temperature--about 5.6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Argixerolls

TYPICAL PEDON: Ryespur stony ashy loam on a forested sideslope with a slope of 10 percent and an elevation of 1426 m

Oi--0 to 1 cm; slightly decomposed plant material of needles, leaves, cones, and roots.

A1--1 to 6 cm; stony ashy loam, brown (7.5YR 4/2) dry, very dark brown (7.5YR 2/2) moist; weak fine and very fine granular structure; soft, very friable, slightly sticky and slightly plastic; many roots; many very fine pores; slightly acid (pH 6.4); clear smooth boundary. (5 to 25 cm thick)

A2--6 to 26 cm; very gravelly ashy loam, brown (7.5YR 5/3) dry, dark reddish brown (5YR 3/3) moist; weak fine subangular blocky structure parting to weak fine granular; slightly hard, friable, slightly sticky and slightly plastic; many roots; common very fine tubular pores; neutral (pH 6.6); gradual smooth boundary. (0 to 25 cm thick)

BA--26 to 44 cm; very gravelly ashy loam, brown (7.5YR 5/3) dry, dark reddish brown (5YR 3/3) moist; weak medium subangular blocky structure; hard, friable, moderately sticky and slightly plastic; many roots; few very fine tubular pores; slightly acid (pH 6.5); gradual smooth boundary. (12 to 25 cm inches thick)

2Bt1--44 to 67 cm; very gravelly clay loam, reddish brown (5YR 5/4) dry, dark reddish brown (5YR 3/4) moist; weak fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common roots; few fine and very fine tubular pores; few faint clay films on gravel; neutral (pH 6.6); clear smooth boundary. (15 to 30 cm inches thick)

2Bt2--67 to 123 cm; very gravelly clay loam, brown (7.5YR 5/3) dry, dark reddish brown (5YR 3/3) moist, dark reddish brown (5YR 3/4) crushed; weak fine and medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common roots; many fine tubular pores; common distinct clay films on gravel; few faint clay films on faces of peds and lining pores; slightly acid (pH 6.3); gradual smooth boundary. (30 to 60 cm inches thick)

2C--123 to 168 cm; very cobbly loam, brown (7.5YR 5/4) dry, dark reddish brown (5YR 3/4) moist; massive; hard, friable, slightly sticky and slightly plastic; common roots; common very fine tubular pores; slightly acid (pH 6.4).

TYPE LOCATION: Klamath County, Oregon; between Doaks Mountain and Spence Mountain; about 302 m north and 100 m east of the southwest corner of section 14, T. 37 S., R. 7 E.; Howard Bay, Oregon USGS quadrangle; latitude 42.3469429 degrees north, longitude 121.9702759 west, datum WGS84 (coordinates estimated from topographic map)

RANGE IN CHARACTERISTICS:

Soil Temperature: frigid regime
Mean annual soil temperature-- 3.0 to 7.8 degrees C
Mean summer soil temperature-- 8.3 to 12.8 degrees C
Mean winter soil temperature-- -1.1 to 3.3 degrees C
Moisture control section--10 to 30 cm; typic xeric regime; moist in winter and spring, dry for 45 to 60 consecutive days after the summer solstice
Rock fragments--volcanic rock, typically andesite; subrounded
Mollic epipedon--40 to 75 cm thick; includes the A and BA horizons
Base saturation (by NH4OAc)--50 to 75 percent throughout the profile
Depth to bedrock--Usually more than 150 cm; some pedons have a lithic or paralithic contact with volcanic rock between 100 and 150 cm

Particle-size control section
*Clay content--18 to 35 percent
*Sand content--30 to 60 percent
*Rock fragment content--35 to 80 percent

Estimated andic properties, from the mineral soil surface to the 2Bt horizon:
*Thickness--40 to 75 cm
*Ammonium oxalate extractable Al plus 1/2 Fe--0.2 to 0.4 percent
*Medium to very coarse sand in the .02 to 2.0 mm fraction--less than 50 percent
*Volcanic glass content--15 to 30 percent
*1/3-bar bulk density--1.00 to 1.35 g/cm3
*1500 kPa water (air-dried samples)--10 to 15 percent

A horizons
Hue--5YR through 10YR
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 to 4 moist, 1 to 4 dry
Fine-earth texture--ashy loam, ashy sandy loam
Total content of all fragments--10 to 50 percent
Total content of rock fragments--10 to 50 percent
Paragravel content--0 to 5 percent fine pumice paragravel
Gravel content--0 to 35 percent
Cobble content--0 to 15 percent
Stone content--0 to 15 percent
Boulder content--0 to 2 percent
Reaction--slightly acid to neutral (pH 6.1 to 7.3)
Organic matter--5 to 10 percent in the A1 horizon, 1 to 5 percent in the A2
Other features--many, weathered plagioclase feldspar grains of 1 to 2 mm in diameter, resembling shot
Thickness--15 to 63 cm

BA horizons (or AB or Bw horizons, if present)
Hue--5YR through 10YR
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 to 4 moist, 1 to 4 dry
Fine-earth texture--ashy loam, ashy sandy loam
Total content of all fragments--10 to 50 percent
Total content of rock fragments--10 to 50 percent
Paragravel content--0 to 5 percent fine pumice paragravel
Gravel content--10 to 35 percent
Cobble content--0 to 15 percent
Stone content--0 to 15 percent
Boulder content--0 to 5 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Organic matter--1.0 to 5.0 percent
Thickness--12 to 25 cm

2Bt horizons
Hue--5YR through 10YR
Value--2 through 4 moist, 4 through 6 dry
Chroma--2 through 4, moist or dry
Fine-earth texture--loam, sandy clay loam, clay loam
Clay content--25 to 35 percent, much of which is in nondispersible sand-sized aggregates
Total content of all fragments--35 to 80 percent
Total content of rock fragments--35 to 80 percent
Paragravel content--0 to 15 percent moderately cemented andesite
Paracobble content--0 to 15 percent moderately cemented andesite
Gravel content--10 to 55 percent
Cobble content--5 to 30 percent
Stone content--0 to 30 percent
Boulder content--0 to 50 percent
Reaction--moderately acid to neutral (pH 5.6 to 7.3)
Organic matter--0.1 to 2.0 percent
Thickness--45 to 160 cm

2C horizon (where present)
Hue--5YR through 10YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--2 through 4, moist or dry
Fine-earth texture--loam, clay loam
Clay content--15 to 30 percent
Total content of all fragments--35 to 80 percent
Total content of rock fragments--35 to 80 percent
Paragravel content--0 to 15 percent moderately cemented andesite
Paracobble content--0 to 15 percent moderately cemented andesite
Gravel content--10 to 55 percent
Cobble content--5 to 45 percent
Stone content--0 to 45 percent
Boulder content--0 to 50 percent
Reaction--Moderately acid to slightly acid (pH 5.6 to 6.5)
Organic matter--0 to 0.5 percent

COMPETING SERIES:
Barneycreek--dry for 60 to 75 consecutive days; silt loam textures in upper horizons; 5-15 percent glass
Getaway--similar; 50 to 90 cm thick mollic epipedon; angular rock fragments; silt loam textures in upper horizons; 5 to 20 percent glass
Klicker--50 to 100 cm deep to bedrock
Klickson--similar; 25 to 50 cm thick mollic epipedon; angular rock fragments; silt loam textures in upper horizons; 5 to 20 percent glass
Larabee--50 to 100 cm deep to bedrock
Millerflat--50 to 75 cm deep to redox depletions
Southworth--50 to 100 cm deep to bedrock
Stemilt--dry for 60 to 75 consecutive days; silt loam textures in upper horizons
Sycreek--90 to 115 cm deep to a densic contact
Wileyflat--50 to 100 cm deep to bedrock (lithic contact with rhyolitic tuff); silt loam textures in upper horizons; soil material meeting vitrandic subgroup properties less than 25 cm thick
* Getaway and Klickson soils are in MLRA 43C. Further review of climate is needed for distinguishing forested soils in MLRA 21 and 43C.

GEOGRAPHIC SETTING:
Elevation--1200 to 2100 m
Climate--subhumid-continental; cold, moist winters and cool, dry summers
Mean annual air temperature-- 3.9 to 7.2 degrees C
Mean January air temperature-- -3.3 degrees C
Mean July air temperature-- 15 degrees C
Mean annual precipitation--450 to 1100 mm
Frost-free period--60 to 80 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Pokegema--medial particle size class; amorphic mineralogy; mudflow deposits; cambic (no argillic) horizons
Lorella--very gravelly clay argillic horizons; bedrock at depths of 25 to 50 cm
Mound--argillic horizons averaging 35 to 45 percent clay and less than 35 percent rock fragments
Royst--20 to 40 inches deep to bedrock; clayey-skeletal
Tournquist--lack argillic horizons; average less than 35 percent rock fragments
Yawhee--udic soil moisture regime (dry for less than 45 days after the summer solstice); have andic soil properties in the surface, with an ashy-skeletal over loamy-skeletal particle size class

DRAINAGE AND PERMEABILITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high to high throughout

USE AND VEGETATION:
Use--timber production, wildlife habitat, livestock grazing, recreation
Vegetation--forest canopy of mainly ponderosa pine and white fir with some sugar pine, Douglas-fir, and incense cedar; variable understory that can include snowbrush ceanothus, serviceberry, greenleaf manzanita, antelope bitterbrush, prostrate ceanothus, creeping snowberry, strawberry, wheeler bluegrass, and Idaho fescue

DISTRIBUTION AND EXTENT: Southern Oregon, MLRA 21; Klamath and Shasta Valleys and Basins, Oregon; MLRA 21; moderate extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California

SERIES PROPOSED:
Klamath County, Oregon, 2007
Origin of the name--Rye Spur trail on the Fremont-Winema National forest, south of Fourmile Lake

REMARKS: This pedon was the typical pedon for the Woodcock series. This area is not considered to be representative of the Woodcock Series. Woodcock is medial-skelatal and has andic soil properties, and this pedon is loamy-skeletal and does not have andic soil properties. The Woodcock typical pedon is moved to a cryic area.

Diagnostic horizons and features recognized in this pedon are:
*Organic soil material--zone 0 to 1 cm (Oi horizon)
*Mollic epipedon--zone from 1 to 44 cm (A1, A2, and BA horizons)
*Vitrandic intergrade feature--zone from 1 to 44 cm (A1, A2, and BA horizons)
*Argillic horizon--zone from 44 to 123 cm (2Bt1 and 2Bt2 horizons)
*Lithologic discontinuity--44 cm
*Particle-size control section--zone from 44 to 94 cm (2Bt1 horizon and part of the 2Bt2 horizon)

ADDITIONAL DATA:
*Characterization data on 4 pedons (S66 Oreg.18-5, 18-6, 18-7, and 18-8) reported in Riverside Soil Survey Laboratory report as Woodcock soils samples in Klamath County, Oregon, 1966. These 4 pedons correspond to Nasis User Pedon IDs S1966OR035005, S1966OR035006, S1966OR035007, S1966OR035011, respectively, and to KSSL pedon IDs 40A0840, 40A0841, 40A0842, 40A0843, respectively. S66 Oreg.18-5 is this Ryespur OSD pedon; the other 3 pedons are assumed to correlate to the Ryespur series as well, rather than Woodcock.
*Characterization data on Nasis Pedon ID S2005OR683015 from Kellogg Soil Survey Laboratory (KSSL) (Site ID 05-JFD-15; KSSL Pedon ID 08N0202)

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National Cooperative Soil Survey
U.S.A.