LOCATION DELP                    NV

Established Series
Rev. WMA/GJS/JBF
01/2023

DELP SERIES

The Delp series consists of very deep, well drained soils that formed in arkosic eolian sand. Delp soils are on dunes and have 0 to 15 percent slopes. The mean annual precipitation is about 125 cm and the mean annual temperature is about 10 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Haplargids

TYPICAL PEDON: Delp loamy sand, rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 3 cm; light gray (10YR 7/2) uncoated wind sorted loamy sand; light brownish gray (10YR 6/2) moist; single grained; loose; nonsticky and nonplastic; many very fine interstitial pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt smooth boundary. (0 to 50 cm thick)

Bt1--3 to 15 cm; light brownish gray (10YR 6/2) and light gray (10YR 7/2) sandy loam, brown (10YR 5/3) moist; moderate thin platy structure; soft, very friable, nonsticky and nonplastic; common very fine roots; few fine tubular and many very fine interstitial pores; few l.5 mm thick lamellae with common thin clay bridges; strongly effervescent; strongly alkaline (pH 8.6); abrupt wavy boundary. (5 to 48 cm thick)

Bt2--15 to 28 cm; light gray (10YR 7/2) sandy loam with pale brown (10YR 6/3) light sandy clay loam lamellae l0 to l5 mm thick, brown (10YR 5/3) moist; weak coarse prismatic structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine and many very fine roots; many very fine interstitial pores; continuous thin and moderately thick clay bridges in lamellae; strongly effervescent; very strongly alkaline (pH 9.2); abrupt wavy boundary. (13 to 30 cm thick)

Bt3--28 to 48 cm; light gray (10YR 7/2) loamy sand with pale brown (10YR 6/3) light sandy clay loam lamellae l to 5 mm thick, grayish brown (10YR 5/2) and brown (10YR 5/3) moist; massive; soft, very friable, nonsticky and slightly plastic; few fine and many very fine roots; many very fine interstitial pores; common thin clay bridges in lamellae; strongly effervescent; very strongly alkaline (pH 9.4); clear wavy boundary. (15 to 30 cm thick)

C1--48 to 69 cm; light gray (10YR 7/2) loamy sand, grayish brown (10YR 5/2) moist; massive, soft, very friable, nonsticky and nonplastic; few fine and very fine roots; many very fine interstitial pores; strongly effervescent; very strongly alkaline (pH 9.6); clear wavy boundary. (15 to 100 cm thick)

C2--69 to 81 cm; light gray (10YR 7/2) cross bedded loamy coarse sand with l to 5 mm thick light brownish gray (10YR 6/2) lamellae, grayish brown (10YR 5/2)moist; massive; soft, very friable, nonsticky and nonplastic; very few few very fine roots; many very fine interstitial pores; common thin clay bridging sand grains in the lamellae; strongly effervescent; very strongly alkaline (pH 9.6); abrupt wavy boundary. (0 to 30 cm)

C3--81 to 104 cm; light gray (10YR 7/2) loamy fine sand, light brownish gray (10YR 6/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine and very fine roots; many very fine interstitial pores; strongly effervescent; very strongly alkaline (pH 9.6); clear wavy boundary (20 to 50 cm thick)

C4--104 to 152 cm; light gray (10YR 7/2) loamy fine sand, grayish brown (10YR 5/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine and very fine roots; many very fine interstitial pores; few thin lamellae with thin clay bridges; slightly and strongly effervescent; very strongly alkaline (pH 9.6).

TYPE LOCATION: Lyon County, Nevada; about l0 miles north of Smith; 400 feet west and l,l00 feet north of the southeast corner of section 32, T. l3 N., R. 24 E. latitude 38 degrees 56 minutes 36 seconds N and longitude 119 degrees 18 minutes 45 seconds W; WGS84 Decimal Degrees 38.9433333 latitude, 119.312500 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist intermittently in winter and spring, dry June through November, typic aridic moisture regime.
Soil temperature: 11 to 12 degrees C.
Solum thickness: 38 to 89 cm.
Carbonates: Slightly effervescent or strongly effervescent throughout.

Particle-size control section - Clay content: Less than 18 percent after mixing.

A horizon
Value: 6 or 7 dry.
Chroma: l or 2.

Bt horizons
Value: 6 or 7 dry.
Chroma: 1 or 2.
Texture: Lamella of sandy clay loam or sandy loam in a sandy loam or loamy sand matrix.
Lamella: Several, 1 to 20 mm thick; color value 5, 6, or 7 dry; chroma 2 or 3.
Reaction: Strongly alkaline or very strongly alkaline.

C horizons
Value: 6 or 7 dry.
Chroma: 1 or 2.
Texture: Loamy fine sand, loamy sand, fine sand or sand.
Other features: Few thin sandy loam or sandy clay loam lamella in some pedons.
Reaction: Strongly alkaline or very strongly alkaline.

COMPETING SERIES: These are the Brinkerhoff, Chacoan, Enos, Glotrain, Granshaw, Mayqueen, Shiprock, Wallson and Woolsey series.

Brinkerhoff soils have gypsum at 50 to 76 cm. Chacoan and Enos soils have bedrock at a depth of 50 to 100 cm. Glotrain soils are moist for 10 to 20 days cumulative from July through September due to summer convection storms. Granshaw soils have an argillic horizon with sandy loam or coarse sandy loam matrix. Mayqueen soils are noncalcareous. Shiprock soils have a noncalcareous solum and are sandy loam to 152 cm. Wallson soils are sandy loam or fine sandy loam to 152 cm and have a noncalcareous solum. Woolsey soils are sandy or gravelly sandy loam to 152 cm.

GEOGRAPHIC SETTING: Delp soils are on partially stabilized dunes at elevations of 1,387 to 1,483 meters. Slopes are 0 to 15 percent. They have formed in arkosic eolian sands, largely from granitic rocks. The climate is cool, arid having warm dry summers and cold dry winters. Mean annual precipitation is 100 to 150 mm. Mean annual temperature is 10 to 11 degrees C. Frost-free season is 100 to 130 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lox soils. Lox soils are have a clay loam natric horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; slow runoff; high saturated hydraulic conductivity.

USE AND VEGETATION: Rangeland and wildlife habitat. Vegetation is principally Bailey greasewood, dalea, Indian ricegrass, shadscale, littleleaf horsebrush, bud sagebrush, fourwing saltbrush, rabbitbrush, and seepweed.

DISTRIBUTION AND EXTENT: Western Nevada. These soils are inextensive. MLRA 27

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED: Lyon County Area, Nevada, 1981.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 3 cm (A horizon).
Argillic horizon - The zone from 3 to 48 cm (Bt1, Bt2 and Bt3 horizons).
Particle-size control section- The zone from 3 to 48 cm (Bt1, Bt2 and Bt3 horizons).

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National Cooperative Soil Survey
U.S.A.