LOCATION CARRYBACK OR
Established Series
Rev.REH/TDT/TM/JBF
01/2012
CARRYBACK SERIES
The Carryback series consists of moderately deep, well drained soils that formed in colluvium and residuum derived from basalt, andesite, and tuff. Carryback soils are on tablelands and have slopes of 0 to 50 percent. The mean annual precipitation is about 300 mm and the mean annual temperature is about 7 degrees C.
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Palexerolls
TYPICAL PEDON: Carryback silty clay loam--rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 8 cm; pale brown (10YR 6/3) silty clay loam, dark brown (10YR 3/3) moist; weak thin platy structure; slightly hard, friable, moderately sticky and moderately plastic; many fine roots; many very fine vesicular pores; 5 percent gravel; slightly alkaline (pH 7.4); abrupt smooth boundary. (5 to 10 cm thick)
A2--8 to 18 cm; brown (7.5YR 5/2) silty clay loam, dark brown (7.5YR 3/2) moist; moderate fine granular structure; slightly hard, friable, moderately sticky and moderately plastic; many fine roots; 5 percent gravel; slightly alkaline (pH 7.4); clear smooth boundary. (0 to 18 cm thick)
2Bt1--18 to 28 cm; brown (7.5YR 5/2) clay; dark brown (7.5YR 3/2) moist; moderate fine and very fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; many fine roots; few faint clay films; 5 percent gravel; slightly alkaline (pH 7.4); clear smooth boundary. (0 to 20 cm thick)
2Bt2--28 to 43 cm; brown (7.5YR 5/2) clay, dark brown (7.5YR 3/2) moist; moderate fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; many fine roots; many very fine tubular pores; few faint clay films; 5 percent gravel and 5 percent cobbles; slightly alkaline (pH 7.6); abrupt smooth boundary. (0 to 25 cm thick)
2Bt3--43 to 61 cm; brown (7.5YR 5/4) clay, brown (7.5YR 4/4) moist; strong fine and medium prismatic structure parting to strong fine blocky; hard, firm, moderately sticky and moderately plastic; common fine roots; common very fine tubular pores; many faint clay films; 5 percent gravel and 5 percent cobbles; slightly alkaline (pH 7.4); clear wavy boundary. (18 to 30 cm thick)
3R--61 cm; basalt.
TYPE LOCATION: Harney County, Oregon; about 5 miles southwest of Venator in the SE1/4 NE1/4 NE1/4 section 26, T. 26 S., R. 35 E.; latitude 43 degrees, 17 minutes, 19 seconds N and longitude 118 degrees 22 minutes 13 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry for one-half to three-fourths of the time when the soil temperature is greater than 5 degrees C; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 7 to 8 degrees C.
Depth to bedrock: 50 to 100 cm.
Mollic epipedon: 18 to 48 cm thick and may or may not include the upper part of the argillic horizon
Other features: There is an absolute clay increase of 15 to 25 percent between the A and 2Bt horizon.
Particle-size control section - Clay content: 40 to 60 percent.
Rock fragments: 0 to 25 percent of which 0 to 25 percent are gravel and 0 to 10 percent cobbles.
A1 horizon
Hue: 10YR or 7.5YR.
Value: 5 or 6 dry, 3 moist (Dry value of 6 only occurs in the upper part of the A horizon).
Chroma: 2 or 3, dry or moist.
Organic matter content: 1.0 to 3.0 percent.
Reaction: Neutral or slightly alkaline.
A2 horizon and AB horizon (if present)
Hue: 10YR or 7.5YR.
Value: 5 or 6 dry, 3 moist.
Chroma: 2 or 3, dry or moist.
Texture: Silty clay loam, clay loam, or loam'
Clay content: 20 to 35 percent.
Rock fragment content: 0 to 15 percent total with 0 to 15 percent gravel, 0 to 5 percent cobbles, and 0 to 3 percent stones.
Organic matter content: 1.0 to 3.0 percent.
Boundary: Abrupt or clear.
Reaction: Neutral or slightly alkaline.
2Bt horizon
Hue: 10YR or 7.5YR
Value: 4 through 6 dry, 3 or 4 moist
Chroma: 2 through 4, dry or moist
Texture: Silty clay, clay, gravelly clay or gravelly silty clay
COMPETING SERIES: These are the
Booth,
Campcreek,
Crowcamp,
Golars ,
Hankins,
Jesh,
Joenchris,
Kidnapspring,
Lacrol,
Longbarn ,
Meaufun ,
Peaviner ,
Tippett,
Warpaint, and
Zumwalt series.
Booth,
Campcreek, Crowcramp,
Golars,
Hankins,
Jesh, Jonchris,
Kidnapspring,
Lacrol,
Longbarn, Meaufin,
Peaviner,
Tippett and
Zumwalt soils have a xeric soil moisture regime.
Warpaint soils are greater than 150 cm to bedrock and have; vitrandic subgroup properties 18 to 33 cm thick
GEOGRAPHIC SETTING: The soils are on tablelands at elevations of 1,220 to 2,015 meters. Slopes are 0 to 50 percent. The soils formed in colluvium and residuum derived from basalt, andesite and tuff. The climate is characterized by cold moist winters and hot dry summers. The mean annual precipitation is 250 to 400 mm. The mean annual temperature is 4 to 8 degrees C. The frost-free period is 50 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Doyn,
Lambring,
Ninemile, and
Madeline soils. Doyn soils are loamy and very shallow. Lambring soils are deep and loamy-skeletal. Ninemile and Madeline soils are shallow to bedrock.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: The soils are used for livestock grazing. Vegetation commonly is low sagebrush, Idaho fescue, bluebunch wheatgrass, and Sandberg bluegrass. Where the A horizon is thicker and depth to the claypan is increased, big sagebrush replaces low sagebrush in the plant community.
DISTRIBUTION AND EXTENT: Southcentral Oregon; MLRA 23. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Lake County, Oregon, Southern Part, 1991.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from surface to 28 cm (A1, A2, 2Bt1 horizons).
Argillic horizon - The zone from 18 to 61 cm (2Bt1, 2Bt2, 2Bt3 horizons).
Pale feature - Absolute clay increase of about 25 percent between the A2 and the 2Bt1 horizons).
Aridic - The soil has an aridic soil moisture regime bordering on xeric.
Particle-size control section - The zone from 18 to 61 cm (2Bt1, 2Bt2, 2Bt3 horizons).
National Cooperative Soil Survey
U.S.A.