LOCATION CONBOY WA
Established Series
Rev. AG/RWL/KMS
09/2019
CONBOY SERIES
Landscape--lake plains
Landform--flats
Slope--0 to 1 percent
Parent material--alluvium derived from mixed sources, including volcanic ash, diatomite, and basalt
Mean annual precipitation--about 890 mm
Mean annual air temperature--about 8 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Medial over clayey, amorphic over smectitic, nonacid, frigid Thaptic Endoaquands
TYPICAL PEDON: Conboy medial clay loam in an area of pasture consisting of reed canarygrass, on a 1-percent, northeast-facing slope at an elevation of 550 m (All textures are apparent field textures.)
Ap1--0 to 23 cm; medial clay loam, brown (7.5YR 5/2) dry, dark brown (7.5YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; many very fine and fine roots; many very fine and fine irregular pores and common fine tubular pores; moderately acid (pH 5.6); clear smooth boundary
Ap2--23 to 36 cm; medial clay loam, gray (10YR 6/1) dry, very dark grayish brown (10YR 3/2) moist; few fine distinct redoximorphic concentrations, strong brown (7.5YR 5/8) dry, strong brown (7.5YR 5/6) moist; moderate medium subangular blocky structure; hard, friable, slightly sticky and nonplastic; many very fine and fine roots; many very fine and fine irregular pores and common fine tubular pores; moderately acid (pH 5.8); abrupt smooth boundary
Bw1--36 to 46 cm; medial silty clay loam, light brownish gray (10YR 6/2) dry, very dark grayish brown (10YR 3/2) moist; few fine distinct redoximorphic concentrations, strong brown (7.5YR 5/8) dry, strong brown (7.5YR 5/6) moist; moderate very coarse prismatic structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine irregular pores; moderately acid (pH 5.8); abrupt smooth boundary
Bw2--46 to 56 cm; medial loam, very pale brown (10YR 8/2) dry, dark brown (10YR 3/3) moist; massive; slightly hard, friable, nonsticky and nonplastic; weakly smeary; common very fine and few fine roots; common very fine and fine irregular pores; fine sand-sized pumice; moderately acid (pH 6.0); abrupt smooth boundary
Bw3--56 to 81 cm; medial silty clay, light brownish gray (10YR 6/2) dry, very dark grayish brown (10YR 3/2) moist; moderate very coarse prismatic structure; slightly hard, friable, slightly sticky and nonplastic; many very fine and common fine roots; many very fine and fine irregular pores; moderately acid (pH 5.8); clear smooth boundary
2Ab1--81 to 107 cm; silty clay loam, grayish brown (10YR 5/2) dry, black (10YR 2/1) moist; massive; slightly hard, friable, slightly sticky and nonplastic; common very fine and few fine roots; many very fine irregular pores and common very fine tubular pores; moderately acid (pH 5.8); clear smooth boundary
2Ab2--107 to 122 cm; silty clay loam, light brownish gray (10YR 6/2) dry, very dark grayish brown (10YR 3/2) moist; about 20 percent fiber, less than 5 percent rubbed; massive; slightly hard, friable, slightly sticky and nonplastic; common very fine and few fine roots; many fine irregular pores and few very fine tubular pores; moderately acid (pH 5.8); clear smooth boundary
3C--122 to 150 cm; sandy loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; few fine distinct redoximorphic concentrations, strong brown (7.5YR 5/6) dry, yellowish red (5YR 5/6) moist; massive; slightly hard, friable, nonsticky and nonplastic; common very fine and few fine roots; many very fine and fine irregular pores; white coarse sand-sized pumice; moderately acid (pH 6.0)
TYPE LOCATION: Klickitat County, Washington, about 6.5 km south of Glenwood; about 460 m north and 60 m west of the southeast corner of section 33, T. 6 N., R. 12 E.; latitude 45.960835, longitude -121.303464, datum WGS 84 (coordinates estimated from section, township, and range)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--7 to 8 degrees C
Organic carbon content in particle-size control section--0.4 to 11.0 percent, decreases irregularly as depth increases
Depth to 2Ab horizon--64 to 94 cm
Profile to a depth of 100 cm--stratified; 18 to 62 percent clay in individual strata and weighted average of 35 to 50 percent clay
Andic soil properties in upper part of 0- to 100-cm particle-size control section
*Estimated moist bulk density--0.50 to 0.85 g/cm3
*Volcanic glass content--30 to 60 percent
*Acid oxalate aluminum plus one-half iron--1 to 2 percent
*Phosphorus retention--50 to 75 percent
*15-bar water retention--15 to 35 percent
Andic soil properties in lower part of 0- to 100-cm particle-size control section
*Estimated moist bulk density--0.95 to 1.20 g/cm3
*Volcanic glass content--0 to 5 percent
*Clay content--35 to 45 percent
Ap horizon
Hue--7.5YR, 10YR
Value--2 or 3 moist, 5 or 6 dry
Chroma--1 or 2 moist or dry
Combined thickness--28 to 41 cm
Bw horizon
Combined thickness--28 to 61 cm
2Ab horizon
Value--1 to 3 moist, 4 to 6 dry
Chroma--0 to 2 moist or dry
Combined thickness--41 to 51 cm
3C horizon
Value--4 or 5 moist, 5 to 7 dry
Chroma--1 to 3 moist or dry
Redoximorphic concentrations--few to common, distinct
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--550 to 580 m
Climate--warm, dry summers; cold, wet winters
Mean annual precipitation--840 to 940 mm
Mean January air temperature--about -3 degrees C
Mean July air temperature--19 degrees C
Mean annual air temperature--6 to 8 degrees C
Frost-free season--50 to 90 days, although damaging frost can occur any month of the year
GEOGRAPHICALLY ASSOCIATED SOILS:
Fanal--coarse-loamy particle-size class
Grayland--mollic epipedon; regular decrease in organic carbon content as depth increases; fine-loamy particle-size class
Guler--medial-skeletal particle-size class
Segidal--spodic horizon
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Saturated hydraulic conductivity (Ksat)--moderately high
Seasonal high water table--present throughout the year, from 30 cm above the surface in March to May to a depth of 46 cm below the surface in September and October
Flooding--frequent and very long in December through June
Ponding--frequent and very long in March to May
USE AND VEGETATION:
Use--mainly production of pasture and hay
Principal introduced plants--reed canarygrass, some sedges and rushes
Native vegetation--Baltic rush, barestem lomatium
DISTRIBUTION AND EXTENT: Southern Glenwood Valley, Klickitat County, Washington; MLRA 6; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakama Nation, Klickitat County, Washington; 2014
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Particle-size control section--zone from the surface to a depth of 100 cm; zone from the surface to a depth of 81 cm classifies as medial (andic soil properties); zone from 81 to 100 cm classifies as clayey
9/1993-Classification changed from fine, mixed, nonacid, frigid Mollic Fluvaquents to medial over clayey, mixed, frigid Thaptic Endoaquands based on Amendment 16 of Soil Taxonomy.
1/1998-Classification revised to include amorphic mineralogy based on laboratory data from the associated Guler series (National Soil Survey Laboratory pedon number 87P064)
12/2005-The Conboy series was in the Klickitat County soil survey area until the boundary with the Yakima Indian Reservation soil survey area was changed in 2003.
ADDITIONAL DATA:
Laboratory data--pedon number 78P0257; National Soil Survey Laboratory
National Cooperative Soil Survey
U.S.A.