LOCATION NAYPED                  NV

Established Series
Rev. WMA/ELS/JBF
11/2016

NAYPED SERIES

The Nayped series consists of very deep well drained soils that formed in alluvium derived from mixed rocks including limestone, sandstone, shale, dolomite and conglomerate. Nayped soils are on alluvial fans. Slopes are 0 to 4 percent. The mean annual precipitation is about 225 mm and the mean annual temperature is about 7 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Durinodic Xeric Haplocambids

TYPICAL PEDON: Nayped loam - cultivated (Colors are for dry soil unless otherwise noted.)

Ap--0 to 10 cm; light brownish gray (10YR 6/2) loam, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common very fine roots; common very fine interstitial pores; moderately alkaline (pH 8.0); abrupt smooth boundary. (0 to 18 cm thick)

A--10 to 18 cm; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak thin platy structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and very fine roots; common very fine tubular pores; moderately alkaline (pH 8.0); clear smooth boundary. (5 to 13 cm thick)

Bw--18 to 41 cm; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; weak medium and coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; common very fine interstitial pores; moderately alkaline (pH 8.2); abrupt irregular boundary. (15 to 36 cm thick)

Bqk1--41 to 66 cm; very pale brown (10YR 7/4) loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine interstitial pores; 30 percent hard and firm durinodes; common carbonate and silica veins and coats; slightly effervescent; strongly alkaline (pH 8.8); gradual wavy boundary. (25 to 36 cm thick)

Bqk2--66 to 104 cm; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine interstitial pores; 20 percent hard and firm durinodes; common silica-carbonate veins and coats; strongly effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary. (0 to 50 cm thick)

Bqk3--104 to 137 cm; light gray (10YR 7/2) very fine sandy loam, brown (10YR 5/3) moist; massive; slightly hard, very friable, nonsticky and slightly plastic; few very fine roots; common very fine interstitial pores; common silica and carbonate veins and coats; strongly effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary. (0 to 50 cm thick)

Bqk4--137 to 152 cm; light yellowish brown (10YR 6/4) loam, yellowish brown (10YR 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; common very fine interstitial pores; few small slightly hard and firm durinodes; strongly effervescent; strongly alkaline (pH 8.9).

TYPE LOCATION: Eureka County, Nevada; 2,450 feet south and 25 feet east of the NW corner of sec. 16, T. 21 N., R. 54 E.; USGS North of Eureka 7.5 minute topographic quadrangle; latitude 39 degrees 41 minutes 16 seconds N and longitude 115 degrees 54 minutes 28 seconds W; WGS84 Decimal Degrees 39.6877778 latitude, -115.9077778 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry in the late spring, summer and fall months, but are moist in the winter and early spring; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 6 to 8 degrees C.
Mean summer soil temperature: 15 to 17 degrees C.
Depth to durinodes and carbonate: 30 to 60 cm.

Particle-size control section - Clay content: 18 to 22 percent.
Rock fragments: 0 to 10 percent.

A horizons
Value: 5 through 7 dry, 3 or 4 moist.
Chroma: 2 or 3.
Structure: Weak to strong, thin to thick platy, or weak subangular blocky where cultivated.
Reaction: Slightly alkaline or moderately alkaline.

Bw horizon
Value: 6 or 7 dry and 3 or 4 moist.
Chroma: 2 through 4.
Texture: Loam, fine sandy loam or very fine sandy loam.
Rock fragments: 0 to 10 percent.
Structure: Weak to moderate, medium and coarse subangular or angular blocky or massive.
Reaction: Slightly alkaline or moderately alkaline.

Bqk horizon
Value: 6 or 7 dry, with carbonate and silica concretions having value of 8, moist is 4 through 6
Chroma: 2 through 4.
Reaction: Moderately alkaline or strongly alkaline.
Durinodes: 20 to 80 percent, slightly hard to very hard, and firm or very firm.
Carbonate and silica coatings: None to common on the durinodes and in pores.

COMPETING SERIES: These are no other series in this family.

GEOGRAPHIC SETTING: Nayped soils are on alluvial fans. Elevations are 1,800 to 1,890 meters. Slope are 0 to 4 percent. The soils formed in alluvium derived from mixed rocks including limestone, sandstone, shale, dolomite and conglomerate. They have significant amounts of volcanic ash. The climate is cool, semiarid with mean annual precipitation of 200 to 250 mm that comes mostly as snow. Mean annual temperature is 6 to 7 degrees C., and the frost free season is 50 to 80 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Alhambra, Bruffy, Holtle, and Kobeh soils. Alhambra and Bruffy soils lack cambic horizons and have irregularly decreasing organic matter with depth. Holtle soils have mollic epipedons. Kobeh soils have loamy-skeletal particle-size control sections.

DRAINAGE AND PERMEABILITY: Well-drained; slow or medium runoff; moderate or moderately slow permeability; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Livestock grazing and irrigated cropland. Small grains and alfalfa are the principal crops. The principal native vegetation is big sagebrush, Sandberg bluegrass, and rabbitbrush.

DISTRIBUTION AND EXTENT: Central Nevada. They are moderately extensive. MLRA 28B

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

SERIES ESTABLISHED: Eureka County (Diamond Valley Area), Nevada, 1971.

REMARKS: Nayped soils were formerly classified as Sierozems.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the surface to 18 cm. (Ap and A horizons).
Cambic horizon - The zone from about 18 to 41 cm (Bw horizons).
Duric horizon - The zone from about 41 to 152 cm (Bqk horizon).
Particle-size control section - The zone from about 25 to 100 cm (Bqk1 and a portion of the Bw and Bqk2 horizons).

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National Cooperative Soil Survey
U.S.A.