LOCATION KIDNAPSPRING OR

Tentative Series
IRD. RJO/RAW/JLW
03/2013

KIDNAPSPRING SERIES

The Kidnapspring series consists of very deep, well drained soils on mountain backslopes. Kidnapspring soils are formed in a mixed volcanic ash mantle overlying clay-producing tuffs. Slopes are 0 to 60 percent. The mean annual precipitation is about 23 inches and the mean annual temperature is about 41 degrees F.

TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Palexerolls

TYPICAL PEDON: Kidnapspring ashy sandy loam - woodland, on a 29 percent northwestfacing slope at an elevation of 3,920 feet. (Colors are for moist soil unless otherwise noted. Andic soil materials are apparent field textures.)

Oi--0 to 2 inches; slightly decomposed needles and twigs.

A--2 to 5 inches; dark brown (10YR 3/3) ashy sandy loam, brown (10YR 5/3) dry; weak very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine, and medium and few coarse roots throughout; common very fine irregular pores; 2 percent gravel, 10 percent cobbles; neutral (pH 7.0); clear smooth boundary. (2 to 10 inches thick)

Bw--5 to 12 inches; dark brown (10YR 3/3) ashy sandy loam, brown (10YR 5/3) dry; moderate medium subangular blocky structure parting to weak fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few fine and common medium roots throughout; common very fine irregular pores; 2 percent gravel, 10 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (5 to 7 inches thick)

2Eb--12 to 15 inches; dark brown (10YR 3/3) cobbly loam, grayish brown (10YR 5/2) dry; weak medium subangular blocky structure parting to weak fine subangular blocky; hard, friable, moderately sticky and moderately plastic; common medium and few fine roots throughout; common very fine irregular pores; 2 percent gravel, 15 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (0 to 5 inches thick)

2Btb1--15 to 33 inches; dark brown (10YR 3/3) clay, brown (10YR 4/3) dry; strong medium angular blocky structure parting to moderate medium angular blocky; extremely hard, firm, very sticky and very plastic; many thick clay films on ped faces; common medium roots throughout; common very fine tubular and irregular pores; neutral (pH 7.0); gradual smooth boundary. (8 to 18 inches thick)

2Btb2--33 to 50 inches; dark yellowish brown (10YR 4/4) clay, yellowish brown (10YR 5/4) dry; strong medium subangular blocky structure parting to moderate fine subangular blocky; hard, friable, very sticky and very plastic; few faint clay films on ped faces; few medium roots throughout; common very fine tubular and interstitial pores; neutral (pH 7.3); gradual smooth boundary. (10 to 23 inches thick)

2Btb3--50 to 61 inches; brown (10YR 5/3) clay, yellowish brown (10YR 5/4) dry; strong medium subangular blocky structure parting to moderate fine subangular blocky; hard, friable, very sticky and very plastic; few thin clay films on ped faces; few medium roots throughout; common very fine tubular and irregular pores; slightly alkaline (pH 7.8).

TYPE LOCATION: Crook County, Oregon,
Section 4 (SW1/4, SW1/4, SE1/4), T. 12 S., R. 17 E.
Latitude 49 degrees, 35 minutes, 17 seconds N.
Longitude 6 degrees, 83 minutes, 44 seconds E.
USGS Quadrangle: Dutchman Creek

RANGE IN CHARACTERISTICS:
Soil Temperature: frigid regime
Mean Annual Soil Temperature: 41 to 46 degrees F
Mean Summer Soil Temperature: 49 to 56 degrees F
Mean Winter Soil Temperature: 34 to 37 degrees F
Soil Moisture: xeric regime, dry 45 to 60 consecutive days in summer

Particle-size Control Section: upper 20 inches of argillic horizon
Clay content: 40 to 50 percent
Rock fragment content: 0 to 10 percent

Diagnostic Horizons and Features:
andic soil properties: upper boundary at the mineral surface; 8 to 14 inches thick
Al+1/2Fe(aox): 0.4 to 1.0 percent
bulk density: 0.85 to 1.2 g/cc
P retention: 30 to 50 percent
0.02-2.0 mm fraction: 30 to 40 percent of fine earth
glass content in the 0.02-2.0mm fraction: 20 to 60 percent
water content at 1500 kPa (air dried): 10 to 20 percent
8Si + 2Fe (aox): 1 to 5 percent
mollic epipedon thickness: 15 to 31 inches

Major Horizons:
A horizon:
color, moist: 5YR 3/2, 7.5YR 2.5/2, 3/2; 10YR 3/3
color, dry: 5YR 4/3; 7.5YR 4/2, 4/3; 10YR 5/3
texture: L, SIL, SL
clay content: 8 to 18 percent
rock fragment content: 5 to 15 percent
gravel: 0 to 10 percent
cobbles: 0 to 10 percent
reaction: slightly acid to neutral; pH: 6.1 to 7.3
base saturation: 65 to 85 percent

Bw horizon; some pedons have a AB horizon:
color, moist: 5YR 3/3; 7.5YR 3/2; 10YR 3/3
color, dry: 5YR 5/3; 7.5YR 5/2, 5/3; 10YR 5/3
texture: L, GR-L, SL
clay content: 15 to 25 percent
rock fragment content: 5 to 15 percent
gravel: 0 to 10 percent
cobbles: 0 to 10 percent
reaction: slightly acid; pH: 6.1 to 6.5
base saturation: 65 to 75 percent

2Eb horizon: some pedons have a 2Bwb horizon
color, moist: 5YR 3/3; 7.5YR 3/3, 4/2; 10YR 3/3
color, dry: 5YR 4/3; 7.5YR 6/2, 6/3; 10YR 5/2
texture: CL, CB-L, CB-CL
clay content: 20 to 35 percent
rock fragment content: 0 to 20 percent
gravel: 0 to 10 percent
cobbles: 0 to 15 percent
reaction: slightly acid; pH: 6.1 to 6.5
base saturation: 70 to 75 percent

2Btb1 and 2 horizons
color, moist: 5YR 4/4; 7.5YR 4/2, 4/3, 4/4, 5/3; 10YR 3/3, 4/4
color, dry: 5YR 4/4; 7.5YR 4/2, 4/3, 4/4; 10YR 4/3, 5/2, 5/4
texture: C, SICL
clay content: 35 to 50 percent
rock fragment content: 0 to 10 percent
gravel: 0 to 5 percent
cobbles: 0 to 5 percent
reaction: slightly acid to neutral; pH: 6.1 to 7.3
base saturation: 70 to 90 percent

2Btb3 horizon; C horizon in some pedons:
color, moist: 5YR 4/6; 7.5YR 3/4, 4/4, 6/3; 10YR 4/3, 5/3, 6/3
color, dry: 5YR 4/6; 7.5YR 5/4, 6/4, 6/6; 10YR 5/4, 6/2, 6/3, 7/2
texture: GR-C, CL, L, C, GR-CL
clay content: 25 to 45 percent
rock fragment content: 0 to 35 percent
gravel 0 to 35 percent
cobbles 0 to 5 percent
reaction: slightly acid to slightly alkaline; pH: 6.6 to 7.8
base saturation: 85 to 100 percent

COMPETING SERIES:
Booth - moderately deep to paralithic weathered tuff; mollic epipedon 7 to 15 inches thick; no ash influence; dry for 80 to 110 days in summer;
Campcreek - dry 60 to 75 days in summer;
Carryback - moderately deep to lithic basalt; no ash influence; aridic soil moisture regime;
Crowcamp - no ash influence; duric Bkq horizon; dry 75 to 90 days in summer;
Golars - moderately deep to lithic basalt; vitrandic subgroup properties less than 7 inches thick; dry 60 to 90 days in summer;
Hankins - vitrandic subgroup properties 7 to 13 inches thick; dry 60 to 90 days in summer;
Jesh - no ash influence
Joenchris - vitrandic subgroup properties 7 to 13 inches thick; 15 to 25 percent gravel in upper part of argillic; dry 75 to 90 days in summer;
Locrol - no ash influence; episaturation at 7 to 16 inches from March to May;
Longbarn - deep to lithic tuff; mollic epipedon 7 to 14 inches thick; vitrandic subgroup properties 7 to 13 inches thick; dry 75 to 90 days in summer;
Meaufun - deep to paralithic weathered tuff; vitrandic subgroup properties 7 to 13 inches thick; dry 60 to 75 days in summer;
Peaviner - deep to lithic tuff; vitrandic subgroup properties 7 to 13 inches thick;
Tippett - vitrandic subgroup properties 7 to 13 inches thick; dry 60 to 90 days in summer;
Warpaint - mollic epipedon 10 to 15 inches thick; vitrandic subgroup properties 7 to 13 inches thick; less than 15 percent gravel in upper part of argillic; aridic soil moisture regime;
Zumwalt - moderately deep to lithic basalt; vitrandic subgroup properties 7 to 13 inches thick; dry 60 to 90 days in summer;

GEOGRAPHIC SETTING:
Landform: concave to planar, mid to lower, depositional mountain backslopes and basins, of water dissected soft pyroclastic flows
Slope gradient: 0 to 60 percent
Parent material: volcaniclastic volcanic ash mixed with and overlying colluvial over residual
Lithology: Mazama ash mixed with and overlying Clarno formation andesitic tuff breccia
Elevation: 3,700 to 5,200 feet
Climate: cold, wet winters; warm, dry summers
Mean annual precipitation: 19 to 27 inches
Mean annual air temperature: 39 to 44 degrees F.
Frost-free period: 40 to 100 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Crackercreek: occur on planar to concave, midslopes; 40 to 60 inches to bedrock; greater than 14 inch thick pure ash mantle; less than 35 percent clay and greater than 35 percent rock fragments in particle-size control section
Lamulita (T): 40 to 60 inches to a paralithic contact; has volcanic ash influence; greater than 35 percent rock fragments in particle-size control section
Meaufun (T): occur on planar to concave, lower slopes; 40 to 60 inches to a paralithic contact; 60 to 75 dry days in summer
Norlo (T): greater than 14 inch thick pure ash mantle; less than 35 percent clay and greater than 35 percent rock fragments in particle-size control section
Potlid (T): occur on planar to convex, midslopes; 20 to 40 inches to bedrock; has volcanic ash influence; greater than 35 percent rock fragments in particle-size control section

DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderate over slow

USE AND VEGETATION:
Use: Woodland, range, recreation, wildlife, watershed
Native vegetation: Grand fir, Douglas fir, ponderosa pine, western juniper, common snowberry, baldhip rose, common yarrow, showy aster, mountain strawberry, heartleaf arnica, sedum, pinegrass, and elk sedge.
Plant association: ABGR/CARU.

DISTRIBUTION AND EXTENT:
Central Oregon, MLRA 10
Distribution: South Central Blue Mountains in Middle Fork and North Forks of John Day River.
Extent: Moderate

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

SERIES PROPOSED: Crook County, Oregon 2007.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
mollic epipedon: 2 to 33 inches; A, Bw, 2Eb, 2Btb
argillic layer: 15 to 60 inches; 2Btb
ash layer: 2 to 14 inches having andic soil properties; A, Bw
particle-size control section: 15 to 35 inches; 2Btb1, 2Btb2

National Cooperative Soil Survey
U.S.A.