LOCATION LEIDL WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Vitrandic Argixerolls
TYPICAL PEDON: Leidl extremely cobbly ashy loam - rangeland on a 55 percent west-facing backslope at an elevation of 1,000 feet. (Colors are for dry soil unless otherwise noted.)
A--0 to 5 inches; brown (7.5YR 5/3) extremely cobbly ashy loam, dark reddish brown (5YR 3/3) moist; weak very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine interstitial pores; 15 percent gravel, 35 percent cobbles and 10 percent stones; slightly acid (pH 6.4); clear smooth boundary. (1 to 5 inches thick)
BAt--5 to 12 inches; reddish brown (5YR 4/4) very gravelly ashy clay loam, dark reddish brown (2.5YR 3/3) moist; weak fine granular structure; slightly hard, friable, moderately sticky and moderately plastic; many very fine roots; many very fine interstitial and few very fine tubular pores; few faint clay films on faces of peds; 45 percent gravel and 10 percent cobbles; slightly acid (pH 6.4); clear wavy boundary. (5 to 15 inches thick)
Bt--12 to 25 inches; brown (7.5YR 5/4) extremely gravelly clay loam, dark reddish brown (5YR 3/4) moist; weak very fine and fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; many very fine interstitial and common very fine tubular pores; many distinct clay films on faces of peds; 50 percent gravel and 20 percent cobbles; neutral (pH 6.6); abrupt irregular boundary. (11 to 20 inches thick)
R--25 inches; fractured basalt.
TYPE LOCATION: Klickitat County, Washington; about 13 miles northwest of Goldendale; 3,500 feet north and 3,000 feet east of the southwest corner of section 31, T. 5 N., R. 14 E. Latitude 45 degrees 52 minutes 45 seconds N. and Longitude 121 degrees 05 minutes 50 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 50 degrees F. The soil moisture control section is dry in all parts for 75 to 90 consecutive days within the 4 months that follow the summer solstice in 6 or more years out of 10. Depth to bedrock is 20 to 40 inches. The upper 7 to 14 inches has an estimated moist bulk density of 1.10 to 1.40 g/cc, volcanic glass content of 5 to 30 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 0.4 to 1.0 percent, phosphate retention of 25 to 50 percent, and 15-bar water retention of 5 to 12 percent for air dried samples. The particle-size control section averages from 35 to 60 percent gravel and 10 to 35 percent cobbles and has 27 to 35 percent clay. Reaction is slightly acid or neutral throughout. Base saturation is less than 75 percent in some part of the solum. The mollic epipedon is 8 to 18 inches thick.
The A horizon has hue of 5YR, 7.5YR, or 10YR, value of 4 or 5 dry and 2 or 3 moist.
The BAt horizon has hue of 2.5YR to 7.5YR and value of 4 or 5 dry. Texture is very gravelly ashy clay loam, very cobbly ashy clay loam, very gravelly clay loam, very cobbly clay loam, extremely gravelly, or extremely cobbly ashy clay loam. Reaction is slightly acid or neutral.
The Bt horizon has hue of 2.5YR to 10YR and chroma of 3 to 6 moist and dry. Texture is very gravelly clay loam or extremely gravelly clay loam. Clay films are faint to distinct on faces of peds and in pores.
COMPETING SERIES: These are the Akna (T), Blint, Brysill (T), Bunselmeier, Cubhill (T), Hehe, Hovelton (T), Lainand, McDaniel, Millhouse (T), Nint (T), Norod, and Skooker series. the Setill series is a similar classification except has isotic mineralogy. The Bunselmeier soils are 40 to 60 inches deep to cinders. Hehe soils are 20 to 40 inches to a paralithic contact and are dry for 60 to 90 consecutive days. Skooker soils are 40 to 60 inches to a paralithic contact and are dry for 60 to 90 consecutive days. Blint and Norod soils are dry for over 90 consecutive days and have a mollic epipedon 20 to 25 inches thick. Lainand soils are dry for over 90 consecutive days and are 40 to 60 inches deep to a lithic contact. Nint soils have a mollic epipedon greater than 20 inches thick. Ackna, Brysill, Cubhil, McDaniel, Millhouse, and Setill soils are very deep. Hovelton soils have 18 to 27 percent clay in the particle-size control section and has an estimated base saturation (sum) of less than 75 percent in some layer within the solum.
GEOGRAPHIC SETTING: Leidl soils are on plateaus and canyon slopes at an elevation of 400 to 4,200 feet. Slopes are 2 to 75 percent. Leidl soil formed in colluvium and residuum from basalt with an influence of volcanic ash in the surface. Summers are warm and dry and winters are cool and moist. The mean annual precipitation is 15 to 25 inches. The average January temperature is 28 degrees F. and the average July temperature is 66 degrees F. The mean annual temperature is 46 to 49 degrees F. The frost-free season is 100 to l40 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dalig, Gunn, Itat, Kaiders, Kiakus, and Yedlick soils. Dalig, Gunn, Itat, Kaiders, and Yedlick soils are deeper than 40 inches to bedrock. Kiakus soils have a mollic epipedon more than 20 inches and are non-skeletal. The Dalig, Gunn, and Kiakus soils are on plateaus and benches. Itat soils are on foothills and plateaus. Kaiders soils are on mountains and foothills. Yedlick soils are on mountains.
DRAINAGE AND PERMEABILITY: Well drained; rapid to very rapid runoff; moderate permeability.
USE AND VEGETATION: These soils are used mainly for wildlife habitat and livestock grazing. Native vegetation includes Idaho fescue, bluebunch wheatgrass, Sandberg bluegrass, arrowleaf balsamroot, biscuitroot, Oregon white oak, lupine, bigheaded clover, and phlox.
DISTRIBUTION AND EXTENT: South-central and central Washington; MLRA 6. The series is of small extent.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Douglas County, Washington, l998.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon the zone from 0 to 12 inches
Argillic horizon the zone from 5 to 25 inches
Lithic contact the zone beginning at 25 inches
Particle-size control section - the zone beginning from 5 to 25 inches
Vitrandic feature the zone from 0 to 12 inches
Ultic feature the zone from 12 to 25 inches having a base saturation (sum) of 73 percent.
ADDITIONAL DATA: NSSL characterization data is available for this soil, NSSL pedon number 87P0063.