LOCATION GRAYLAND WAEstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, frigid Argiaquic Argialbolls
TYPICAL PEDON: Grayland silty clay loam on a 1 percent north-facing slope in a managed pasture of reed canarygrass and redtop at 1,830 feet elevation. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Ap1--0 to 4 inches; black (10YR 2/1) silty clay loam, gray (10YR 5/1) dry; weak medium granular structure; hard, friable, slightly sticky and nonplastic; many very fine and fine roots; many very fine irregular pores; strongly acid (pH 5.2); clear smooth boundary. (3 to 7 inches thick)
Ap2--4 to 8 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry; weak fine and medium subangular blocky structure; hard, friable, slightly sticky and nonplastic; many very fine and fine roots; many very fine irregular pores and common fine tubular pores; moderately acid (pH 5.6); clear wavy boundary. (3 to 11 inches thick)
E--8 to 15 inches; dark gray (10YR 4/1) silty clay loam, light gray (10YR 7/1) dry; weak medium subangular blocky structure; hard, friable, slightly sticky and nonplastic; common very fine and fine roots; many very fine irregular pores and common very fine tubular pores; neutral (pH 6.6); gradual smooth boundary. (2 to 9 inches thick)
Btg--15 to 24 inches; dark grayish brown (10YR 4/2) clay, gray (10YR 6/1) dry; weak medium subangular blocky structure; very hard, firm, slightly sticky and slightly plastic; common very fine and fine roots; many very fine irregular pores and many very fine tubular pores; distinct continuous clay films; common fine faint redox concentrations of very dark grayish brown (10YR 3/2), dark grayish brown (10YR 4/2) dry; neutral (pH 6.9); gradual smooth boundary. (5 to 16 inches thick)
2Cg--24 to 34 inches; dark grayish brown (10YR 4/2) sandy loam, grayish brown (10YR 5/2) dry; massive; very hard, slightly sticky and slightly plastic; common very fine and fine roots; many very fine irregular pores and common fine tubular pores; common fine distinct redox concentrations of dark yellowish brown (10YR 4/6), yellowish brown (10YR 5/6) dry; neutral (pH 7.3); clear smooth boundary. (7 to 16 inches thick)
2C1--34 to 45 inches; brown (10YR 5/3) sandy loam, very pale brown (10YR 7/3) dry; massive; hard, firm, slightly sticky and nonplastic; few fine roots; many very fine irregular pores; common fine distinct redox concentrations of yellowish brown (10YR 5/6), strong brown (7.5YR 5/6) and reddish yellow (7.5YR 6/6) dry; slightly alkaline (pH 7.6); clear smooth boundary. (7 to 15 inches thick)
2C2--45 to 60 inches; brown (10YR 5/3) sandy loam, pale brown (10YR 6/3) dry; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; many very fine irregular pores; many medium prominent redox concentrations of red (2.5YR 4/6), yellowish red (5YR 4/6), and yellowish red (5YR 5/6) dry; neutral (pH 7.2).
TYPE LOCATION: Klickitat County, Washington; about 6 miles southwest of Glenwood; 2,200 feet north and 1,100 feet east of the SW corner section 5, T. 5 N., R. 12 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 45 to 47 degrees F. The mollic epipedon is 8 to 13 inches thick. The solum is 20 to 36 inches thick. Rock fragments in the control section range from 0 to 2 percent. Clay content in the control section averages from 35 to 60 percent. The sand in the particle-size control section is 30 to 60 percent volcanic ash and contains recognizable diatoms.
The A horizon has value of 2 or 3 moist, 4 or 5 dry and chroma of 0 or 1 moist and dry. Reaction is strongly acid or moderately acid.
The E horizon has hue of 10YR or 2.5Y, value of 4 to 6 moist, 7 or 8 dry and chroma of 0 or 1 moist and dry. Texture is silt loam or silty clay loam. Reaction is slightly acid or neutral.
The Bt horizon has hue of 10YR or 2.5Y, value of 3 to 5 moist, 6 or 7 dry and chroma of 1 or 2 moist and dry. Texture is silty clay loam, silty clay or clay. Reaction is slightly acid or neutral.
The 2C horizon has hue of 10YR or 2.5Y, value of 4 or 5 moist, 5 to 7 dry and chroma of 2 or 3 moist and dry. Redox concentrations have hue of 7.5YR or 10YR, value of 4 to 6 dry, 3 to 5 moist and chroma of 4 to 8 moist and dry. Reaction is neutral or slightly alkaline.
COMPETING SERIES: There are no competing series. The
Enloe and
Tonka series are in similar families.
Enloe soils have smectitic mineralogy
Tonka soils have smectitic mineralogy
GEOGRAPHIC SETTING: Grayland soils are on lacustrine terraces above the extinct Conboy Lake at elevations of 1,800 to 2,000 feet. Slopes are 0 to 1 percent. The soils formed in lacustrine deposits and alluvium from basalt and volcanic ash. Summers are warm and dry, winters are cold and wet with an intermittent snow cover from December through March. The mean annual precipitation is 33 to 37 inches. The average January temperature is 27 degrees F. and the average July temperature is 66 degrees F. The mean annual temperature is 42 to 45 degrees F. The frost-free season is 50 to 90 days, although a damaging frost can occur any month of the year.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Conboy, Fanal, and Segidal soils. Conboy soils are in lake basins, lack an argillic horizon and have an irregular decrease in organic carbon. Fanal soils are on toe slopes, coarse-loamy and have a xeric moisture regime. Segidal soils are on lacustrine terraces, coarse-loamy and have a spodic horizon.
DRAINAGE AND PERMEABILITY: Poorly drained; ponded to very slow runoff; slow permeability. A seasonal high water table is at it's uppermost level during March and April.
USE AND VEGETATION: These soils are used mainly for pasture and hay production. Introduced species are meadow foxtail, reed canarygrass, redtop and timothy. Native vegetation is sedge, biscuitroot, common snowberry rose, and alder.
DISTRIBUTION AND EXTENT: Southern Glenwood Valley, Klickitat County, Washington; MLRA 6. The series is of small extent.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 0 to 8 inches
Albic horizon - the zone from 8 to 15 inches
Argillic horizon - the zone from 15 to 24 inches
Particle-size control section - the zone from15 to 24 inches
ADDITIONAL DATA: Laboratory data are available (S78WA-039-007).