LOCATION DISABEL NV+CAInactive Series
TAXONOMIC CLASS: Fine, smectitic, frigid Xeric Natrargids
TYPICAL PEDON: Disabel silty clay loam - virgin. (Colors for dry conditions unless otherwise noted).
A11--0 to 2inches; light brownish-gray (10YR 6.5/2) silty clay loam, dark grayish-brown (10YR 4/2) moist; strong thick platy structure; slightly hard, friable, sticky, very plastic; abundant very fine and fine roots; many fine and medium vesicular, and common fine interstitial pores; effervescent; moderately alkaline (pH 8.4); abrupt slightly wavy boundary. (l to 2 inches thick.)
A12--2 to 11 inches; light brownish-gray (10YR 6/2) silty clay loam, brown (10YR 4/3) moist; strong very thin platy structure; slightly hard, friable, sticky, very plastic; abundant very fine and fine roots; few fine tubular pores; matrix is noneffervescent but effervescent in spots; moderately alkaline (pH 8.4); clear smooth boundary. (2 to 10 inches thick.)
B1t--11 to 17 inches; light brownish-gray (10YR 6/2) clay, brown (10YR 4/3) moist; weak medium prismatic and strong fine angular blocky structure; hard, friable, very sticky, very plastic; abundant very fine and fine exped roots; few very fine and fine tubular pores; few thin clay films on ped faces and common thin clay films in pores; matrix is noneffervescent but effervescent in spots; moderately alkaline (pH 8.3); clear smooth boundary. (4 to 8 inches thick.)
B21t--17 to 26 inches; pale brown (10YR 6/3) clay, brown (10YR 4/3) moist; moderate medium prismatic and strong fine angular blocky structure; hard, firm, very sticky, very plastic; plentiful very fine and fine exped roots; common very fine and fine tubular pores; many thin clay films on ped faces and continuous thin in pores; matrix is noneffervescent but slightly effervescent in spots; moderately alkaline (pH 8.2); clear smooth boundary. (6 to 10 inches thick.)
B22t--26 to 40 inches; pale brown (10YR 6/3) silty clay with few fine distinct white (10YR 8/1) lime filaments, brown (10YR 4/3) moist; moderate medium prismatic and strong medium and fine platy structure; hard, friable, very sticky, very plastic; plentiful very fine and fine roots; common very fine and fine tubular pores; many thin clay films on ped faces and in pores; effervescent but violently effervescent in spots; moderately alkaline (pH 8.3); clear slightly wavy boundary. (10 to 20 inches thick.)
C1--40 to 50 inches; light brownish-gray (10YR 6/2) silty clay loam with common fine distinct white (10YR 8/1) lime filaments, manganese mottles, dark grayish-brown (10YR 4/2) moist; strong very fine angular blocky structure; hard, friable, sticky, plastic; very few fine roots; common fine and very fine tubular pores; few thin clay films in pores; effervescent but violently effervescent in spots; moderately alkaline (pH 8.4); clear smooth boundary. (9 to 20 inches thick.)
IIC2--50 to 60 inches; light brownish-gray (2.5Y 6/2) silty clay with many fine distinct very dark brown (10YR 2/2) manganese mottles, dark grayish-brown (2.5Y 4/2) moist; moderate very fine angular blocky structure; extremely hard, very firm, very sticky, very plastic; very few fine roots; few very fine and fine tubular pores; effervescent; strongly alkaline (pH 8.6).
TYPE LOCATION: The site is located approximately 200 feet north and 100 feet east of the south 1/4 corner of Section 7, T. 36 N., R. 19 E., Mount Diablo base line and meridian, Washoe County, Nevada.
RANGE IN CHARACTERISTICS: These soils are usually dry but are moist more than 1/4 of the time the soil temperature is more than 41 degrees F. The mean annual soil temperature ranges from 44 to 46 degrees F., and the mean summer soil temperature ranges from 62 to 64 degrees F. Mineralogy is montmorillonitic.
Thickness of the solum ranges from 30 to 54 inches. The soils are usually calcareous throughout the profile, but range from noneffervescent to violently effervescent. pH values range from 6.8 to 8.8, being lowest in the A1 and upper B horizons where noncalcareous, and highest in the lower B or C horizons. Color of the A1 horizons includes hues of 10YR or 2.5Y, values of 5.5 to 6.5 dry and 3 or 4 moist, and chromas of 2 or 3. Structure ranges from weak to strong, thin to thick platy, or is massive. Consistence ranges from soft or slightly hard. Color of the B2t horizon includes hues of 10YR, values of 5 or 6 dry and 3 or 4 moist, and chromas of 2 or 3. Texture is predominantly silty clay or clay, but may include heavy silty clay loam or heavy clay loam. When the upper 20 inches of the argillic horizon is mixed, the weighted average clay content is greater than 35 percent. Structure of the B2t horizon ranges from moderate or strong, medium or coarse prismatic or angular blocky, or thin to thick platy. Few to common, very fine to medium lime segregations occur in the lower part. Color of the C and IIC horizons includes hues of 10YR or 2.5Y, values of 6 or 7 dry and 4 or 5 moist, and chromas of 2 or 3. High chroma iron and low chroma manganese mottles can occur below 40 inches in unconformable lacustrine materials. Weak silica-cementation may also occur at depths below 40 inches. The C horizons consist of loamy or silty materials, while the IIC horizons consist of clayey materials.
COMPETING SERIES: Buckrake and Toney soils have been classified in the same family. Buckrake soils differ by having 20 to 36 inch thick sola, distinct medium to very coarse lime segregations coating structural aggregates in the lower part of their Bt horizons, and hard bedrock at 20 to 54 inches. Toney soils differ by having 2 to 4 inch A2 horizons and columnar B2t horizons. Schamp and Short Creek soils are also similar. Schamp soils differ by having mean annual soil temperatures greater than 47 degrees F., 20 to 36 inch thick, lime-free sola. Short Creek soils differ by having 35 to 50 percent coarse fragments in their B2t horizons, and 40 to over 60 inch thick sola and depth to soft tuff bedrock.
GEOGRAPHIC SETTING: Disabel soils are on smooth, nearly level to lacustrine terraces having slope gradients less than 2 percent. They have developed in silty or loamy lacustrine sediments derived mainly from tuffs and basalts. These soils occur at elevations of 4,500 to 5,000 feet in a cold, continental climate having an average annual precipitation of 8 to 12 inches. The mean annual air temperature ranges from 42 to 44 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: Disabel soils occur in the same general area as Crutcher and Jessie Camp soils at lower elevations and Ravendale and Powley soils at higher elevations. Crutcher soils lack diagnostic subsurface horizons and have silty clay control sections. Jessie Camp soils have very fine sandy loam cambic horizons and fine-silty control sections. Ravendale soils have clay or silty clay control sections that contain slickensides. Powley soils have mollic epipedons and indurated duripans.
DRAINAGE AND PERMEABILITY: Well drained. Surface runoff is slow. Permeability is slow.
USE AND VEGETATION: Used for livestock grazing. Big sagebrush and Great Basin wildrye constitute the major portion of the vegetative cover. Small amounts of greasewood and shadscale occur at lower elevations.
DISTRIBUTION AND EXTENT: These soils occur in northern Washoe County, Nevada and are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: The Surprise Valley-Home Camp Area, Lassen and Modoc Counties, California and Washoe County, Nevada, 1996. Disabel is the name of a small reservoir about 15 miles southeast of the type location.
REMARKS: This series was inactivated in 2007 as a result of the update and recorrelation of the Soil Survey of Surprise Valley-Home Camp Area, California and Nevada in 2006.
Disabel soils were formerly classified as Sierozem soils.
OSED scanned by SSQA. Last revised by state on 5/68.