LOCATION TIGIT WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Ultic Haploxeralfs
TYPICAL PEDON: Tigit ashy loam - forested on an 8 percent southwest-facing slope at an elevation of 2,200 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1.5 inches; slightly decomposed needles, leaves, and twigs.
A--1.5 to 4 inches; brown (7.5YR 5/2) ashy loam, dark reddish brown (5YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky and nonplastic; weakly smeary; many very fine and fine roots; many very fine irregular pores; 10 percent gravel and 5 paragravel; slightly acid (pH 6.2); clear smooth boundary. (1 to 4 inches thick)
AB--4 to 7 inches; light reddish brown (5YR 6/3) ashy loam, dark reddish brown (5YR 3/3) moist; weak fine subangular blocky structure parting to coarse granular; slightly hard, friable, slightly sticky and nonplastic; weakly smeary; many very fine, common fine and few medium roots; many fine irregular pores; 5 percent paragravel; slightly acid (pH 6.2); clear wavy boundary. (1 to 4 inches thick)
BA--7 to 16 inches; light brown (7.5YR 6/4) loam, dark reddish brown (5YR 3/4) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine and few coarse roots; many fine irregular pores; 5 percent paragravel; slightly acid (pH 6.2); clear smooth boundary. (4 to 10 inches thick)
Bt1--16 to 31 inches; light brown (7.5YR 6/4) loam, dark reddish brown (5YR 3/4) moist; weak medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common very fine and fine roots; many very irregular pores; few faint clay films on faces of peds and in pores; 5 percent paragravel; moderately acid (pH 6.0); clear wavy boundary. (12 to 18 inches thick)
Bt2--31 to 40 inches; light brown (7.5YR 6/4) very paragravelly loam, dark reddish brown (5YR 3/4) moist; weak medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common very fine, fine and few medium roots; many fine irregular and many fine tubular pores; few faint clay films on faces of peds and in pores; 35 percent paragravel; 5 percent cobbles and 5 percent stones; moderately acid (pH 6.0); clear smooth boundary. (9 to 13 inches thick)
Cr--40 inches; weathered basalt; few fine roots; 25 percent cobbles and stones.
TYPE LOCATION: Klickitat County, Washington; about 5 miles northwest of Klickitat; 2,800 feet north and 200 feet west of the southeast corner, section 1, T. 4 N., R. 12 E. (Latitude 45 degrees, 51 minutes, 43 seconds N. and Longitude 121 degrees, 14 minutes, 20 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 51 degrees F. The soil moisture control section is dry in all parts for 60 to 75 consecutive days within the 4 months that follow the summer solstice in 6 or more years out of 10. Depth to the paralithic contact is 20 to 40 inches. The surface volcanic ash influenced layer is 2 to 6 inches thick and has an estimated 5 to 10 percent glass and 0.4 to 1.0 percent acid oxalate extractable Al + 1/2 Fe. The particle-size control section averages 18 to 25 percent clay and has 5 to 45 percent pararock fragments, 0 to 20 percent gravel, and 0 to 15 percent cobbles and stones. Reaction is moderately acid or slightly acid throughout.
The A horizon has hue of 5YR or 7.5YR, value of 5 or 6 dry and chroma of 2 to 4 dry, 2 or 3 moist.
The AB and BA horizons have hue of 5YR or 7.5YR, value of 5 or 6 dry and chroma of 3 or 4 dry or moist. Texture is ashy loam or gravelly ashy loam in the AB horizon and loam or gravelly loam in the BA horizon.
The Bt horizon has hue of 5YR or 7.5YR and value of 3 or 4 moist. Clay films range from few to many and from faint to prominent. Texture is loam, cobbly loam or gravelly loam, or very paragravelly loam.
COMPETING SERIES: These are the
Beal,
Boardburn,
Boomer,
Casabonne,
Cherryhill,
Cle Elum,
Cohasset,
Crozier,
Dalig,
Fives,
Fong (T),
Fordcreek,
Gunn,
Hood,
Latourell,
Lettia,
Norling,
Para,
Pishpishee (T),
Rosehaven,
Sanhedrin,
Varelum, and
Wohly series.
Beal soils - greater than 60 inches to bedrock; dry 45 to 60 consecutive days following the summer solstice
Boardburn soils - 40 to 60 inches to paralithic contact (andesite); dry 110 to 130 consecutive days following the summer solstice
Boomer soils - 40 to 80 inches to paralithic contact (greenstone); dry 105 to 130 consecutive days following the summer solstice
Casabonne soils - 40 to 60 inches to lithic contact (sandstone); dry 90 to 120 consecutive days following the summer solstice
Cherryhill soils - 40 to 60 inches to paralithic contact (sandstone); MAST 53 to 55 degrees F.
Cle Elum soils - 20 to 40 inches to paralithic contact (sandstone); dry 75 to 90 consecutive days following the summer solstice
Cohasset soils - 40 to 80 inches to paralithic contact (andesitic breccia); dry 120 to 150 consecutive days following the summer solstice; MAST 54 to 59 degrees F.
Crozier soils - 20 to 40 inches to paralithic contact (andesitic breccia); dry 120 to 150 consecutive days following the summer solstice
Dalig soils - greater than 60 inches to bedrock; dry for 60 to 75 days following the summer solstice; lacks ash influence
Fives - greater than 60 inches to bedrock; dry for 75 to 110 days following the summer solstice
Fong soils - 40 to 60 inches to lithic contact (schist); dry 90 to 120 consecutive days following the summer solstice
Fordcreek soils - 40 to 60 inches to paralithic contact (granite); dry 75 to 110 consecutive days following the summer solstice
Gunn soils - greater than 60 inches to bedrock; dry 90 to 105 consecutive days following the summer solstice
Hood soils - greater than 60 inches to bedrock; dry 60 to 75 consecutive days following the summer solstice; MAST of 51 to 53 degrees F.
Latourell soils - greater than 60 inches to bedrock; MAST of 54 to 56 degrees F.
Lettia soils - 40 to 60 inches to paralithic contact (granodiorite); dry 45 to 60 consecutive days following the summer solstice
Norling soils - 20 to 40 inches to paralithic contact (metavolcanic); dry 45 to 60 consecutive days following the summer solstice
Para soils - greater than 60 inches to bedrock; dry 45 to 60 consecutive days following the summer solstice
Pishpishee soils - 65 to 85+ inches to lithic contact; dry 80 to 100 consecutive days following the summer solstice
Rosehaven soils - greater than 60 inches to bedrock; dry 45 to 60 consecutive days following the summer solstice; MAST of 52 to 57 degrees F.
Sanhedrin soils - 40 to 60 inches to lithic contact (sandstone/siltstone); dry 90 to 120 consecutive days following the summer solstice
Varelum soils - 40 to 60 inches to paralithic contact (sandstone)
Wohly soils - greater than 60 inches to bedrock; dry 90 to 120 consecutive days; MAST of 54 to 59 degrees F.
GEOGRAPHIC SETTING: Tigit soils are on plateaus at elevations of 1,600 to 2,500 feet. Slopes are 2 to 30 percent. They formed in residuum and colluvium derived from basalt with a minor amount of volcanic ash in the surface. Summers are warm and dry; winters are cool and wet. The mean annual precipitation is 25 to 35 inches. The average January temperature is 26 degrees F. and the s average July temperature is 64 degrees F. The mean annual temperature is 44 to 48 degrees F. The frost-free season is 110 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fanal, Kaiders, McGowan, and the competing Dalig and Para soils. Fanal soils have a mollic epipedon and are on toeslopes. Kaiders soils are loamy-skeletal and are on mountains and foothills. McGowan soils are very deep, have an ash influenced surface layer and are on plateaus. Dalig soils are on hillsides, plateaus and bences. Para soils are on plateaus.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used mainly for timber production, grazable woodland, and wildlife habitat. Vegetation is Douglas-fir, ponderosa pine, grand fir and Oregon white oak with an understory of western hazel, creambush oceanspray, common snowberry, rose, and redstem ceanothus.
DISTRIBUTION AND EXTENT: Klickitat County, Washington. MLRA 6. The series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 1.5 to to 7 inches
Argillic horizon - the zone from 17 to 40 inches
Paralithic contact - the zone beginning at 40 inches.
Vitrandic feature - the zone from 1.5 to 7 inches
Depth to diagnostic horizons and features are measured from the top of the first mineral layer.