LOCATION LAPED NV+IDEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, mesic, shallow Typic Argidurids
TYPICAL PEDON: Laped gravelly loam, rangeland. (Colors are for dry soil unless otherwise noted.) The surface is covered by approximately 30 percent pebbles.
A1--0 to 3 inches; light gray (10YR 7/2) gravelly loam, brown (10YR 4/3) moist; moderate medium platy structure; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine roots; common very fine and fine vesicular pores; 20 percent pebbles; moderately alkaline (pH 8.2); abrupt smooth boundary. (2 to 4 inches thick)
A2--3 to 6 inches; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; moderate very thin platy structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots; many very fine and fine vesicular pores; 5 percent pebbles; moderately alkaline (pH 8.2); clear smooth boundary. (0 to 5 inches thick)
Bt--6 to 12 inches; light yellowish brown (10YR 6/4) gravelly clay loam, dark yellowish brown (10YR 3/4) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, sticky and plastic; common medium roots; common very fine and fine tubular pores; few thin clay films on peds and bridging sand grains; 10 percent pebbles, 5 percent cobbles; moderately alkaline (pH 8.2); clear smooth boundary. (3 to 7 inches thick)
Btk--12 to 18 inches; light yellowish brown (10YR 6/4) gravelly clay loam, dark yellowish brown (10YR 3/4) moist; moderate fine prismatic structure parting to strong fine angular blocky; hard, firm, sticky and plastic; common very fine and fine roots; common very fine and fine tubular pores; few thin clay films on peds and bridging sand grains 5 percent pebbles, 5 percent cobbles; few fine strongly effervescent lime filaments and thin lime coatings on undersides of coarse fragments; noneffervescent matrix; moderately alkaline (pH 8.3); abrupt wavy boundary. (0 to 6 inches thick)
Bkqm--18 to 23 inches; white (10YR 8/2) indurated duripan with 2 millimeter thick laminae cap, pale brown (10YR 6/3) moist; massive; extremely hard and extremely firm; violently effervescent; clear wavy boundary. (3 to 10 inches thick)
R--23 inches; hard bedrock.
TYPE LOCATION: Lander County, Nevada, approximately 52 miles southwest of Battle Mountain, about 1,800 feet south and 400 feet west of the northeast corner of section 22, T. 24 N., R. 40 E.
RANGE IN CHARACTERISTICS:
Soil moisture - Moist for short periods in winter and early spring, dry in May through October.
Soil temperature - 47 to 52 degrees F.
Solum thickness and depth to duripan - l4 to 20 inches.
Depth to bedrock - 20 to 30 inches.
Control section - Clay content: 27 to 35 percent.
Rock fragments: 15 to 35 percent mainly pebbles.
Other features - Some pedons have a thin Bkq horizon above the duripan. Some pedons are slightly effervescent due to recharge from airborne dust.
A horizon - Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 through 4.
Bt horizon - Hue: 7.5YR or 10YR.
Value: 5 or 6 dry, 3 through 5 moist.
Chroma: 4 through 6.
Structure: Prismatic, angular blocky or subangular blocky.
Texture: Gravelly clay loam or gravelly silty clay loam
Reaction: Moderately alkaline with lower subhorizons of some pedons being strongly alkaline.
SAR: Ranges from 2 to 10, with the concentration usually increasing with depth.
Carbonates: Lower subhorizon, noneffervescent to slightly effervescent matrix with secondary carbonates as filaments or coats common in most pedons.
COMPETING SERIES: These are the Cleaver (NV), (Polking) (T) (NV) Shoofly (ID), Silent (NV), and Spanel (NV) series. The Cleaver, Shoofly, Silent and Spanel soils do not have a lithic contact within 60 inches.
GEOGRAPHIC SETTING: Laped soils are on plateaus, mountains, table lands, calderas, foothill and hill side slopes, crests, shoulders and summits. They formed in alluvium, residuum and colluvium from rhyolitic tuff, andesite and basalt. Elevations are 3,800 to 6,400 feet. Slopes are 1 to 50 percent. The climate is arid with hot, dry summers and cool, moist winters. The mean annual precipitation is about 5 to 9 inches; mean annual temperature is about 45 to 50 degrees F., and the frost-free season is 90 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Colbar, Old Camp, Osoll, and Puett series. Colbar soils lack a duripan and have a lithic contact at 20 to 40 inches. Old Camp soils lack a duripan and have an aridic soil moisture regime bordering on xeric. Osoll soils are loamy-skeletal and lack an argillic horizon. Puett soils lack diagnostic horizons and are shallow to a paralithic contact.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderately slow permeability.
USE AND VEGETATION: Livestock grazing and wildlife habitat. The vegetation is mainly shadscale, bud sagebrush, and bottlebrush squirreltail.
DISTRIBUTION AND EXTENT: Laped soils are in north-central Nevada and Southwestern Idaho. These soils are extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Lander County, South Part, Nevada, 1985.
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Argillic horizon - The zone from about 6 to 18 inches (the Bt and Btk horizon).
Indurated duripan - The zone from about 18 to 23 inches (the Bkqm horizon).
Lithic contact - The boundary at about 23 inches (the R horizon).
Particle-size control section - The zone from about 6 to 18 inches (the Bt and Btk horizons).
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.