LOCATION HAAR NVEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, nonacid, mesic, shallow Xeric Torriorthents
TYPICAL PEDON: Haar gravelly loam, rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 5 cm; light brownish gray (10YR 6/2) gravelly loam, brown (10YR 4/3) moist; weak medium and fine granular structure; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine interstitial pores; 30 percent pebbles, slightly alkaline (pH 7.6); abrupt smooth boundary. (3 to 10 cm thick)
C--5 to 15 cm; light gray (10YR 7/2) silt loam, brown (10YR 5/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few coarse, common medium and fine, and many very fine roots, many fine and very fine interstitial pores; 80 percent pebble size fragments of soft siltstone; moderately alkaline (pH 8.2); clear wavy boundary. (0 to 23 cm thick)
Cr--15 cm; fractured layered sandstone, mudstone, and siltstone with a hardness of less than 3. Root mats are in the fractures.
TYPE LOCATION: Lyon County, Nevada; l/2 mile northwest of the top of Aldrich Grade; 450 feet east of the southwest corner of section l, T. 7 N., R. 27 E.; latitude 39 degrees 29 minutes 17 seconds N and longitude 118 degrees 55 minutes 23 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture - These soils are usually dry. They are moist from late fall to early spring; aridic bordering on xeric.
Soil temperature - 11 to 14 degrees C.
Depth to paralithic contact - 10 to 25 cm.
Reaction: Neutral through moderately alkaline.
Particle-size control section - Percent clay: l0 to l8 percent.
Rock fragments: 50 to 90 percent pebble size, soft mudstone, siltstone and sandstone. Most fragments slake in water or crush easily when wet.
A horizon - Hue: 2.5Y or l0YR.
Value: 6 through 8 dry; 3 through 6 moist.
Chroma: 2 or 3.
Structure: Granular or platy.
Rock fragments: Up to 30 percent hard rock fragments from higher geologic formations.
C horizon (where present) - Hue: 2.5Y or l0YR.
Value: 6 or 7 dry; 3 through 5 moist.
Chroma: 2 or 3.
Texture: Sandy loam, loam or silt loam.
Structue: Massive or subangular blocky.
COMPETING SERIES: These are the Boondock, Budihol and Nicanor series.
Boondock soils average 18 to 30 percent clay and 5 to 15 percent rock fragments. Budihol soils have l5 to 35 percent hard pebbles in the particle-size control section and have hard bedrock at a depth of 50 to 76 cm. Nicanor soils have a lithic contact at a depth of 50 to 100 cm and a control section with l8 to 27 percent clay and l5 to 35 percent hard pebbles
GEOGRAPHIC SETTING: Haar soils are on sides of dissected Tertiary pediments with convex slopes of 8 to 50 percent. Elevations are 1,524 to 1,982 meters. These soils formed in residuum from soft Tertiary sedimentary bedrock. The mean annual temperature is about 9 to 12 degrees C. and the mean annual precipitation is 150 to 200 mm. The frost-free season is l00 to l20 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Ravenell series. Ravenell soils have an argillic horizon and are on stable surfaces.
DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderate permeability; moderately high saturated hydraulic conductivity. The bedrock takes in water at varying rates depending on the angle of bedding, hardness, and composition.
USE AND VEGETATION: Rangeland, wildlife habitat, and recreation. Native vegetation is a very spares Utah juniper and singleleaf pinyon stand with desert needlegrass, Indian ricegrass, Wyoming big sagebrush, antelope bitterbrush, and Anderson peachbrush.
DISTRIBUTION AND EXTENT: Western Nevada. The soils are not extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Lyon County Area, Nevada, l98l.
REMARKS: Diagnostic features recognized in this pedon are:
Paralithic contact - The boundary between soil and soft bedrock at 15 cm (Cr layer).
Particle-size control section - The zone from the surface to 15 cm (A and C horizons).