LOCATION PRIDEEN                 NV

Established Series
Rev. DD/TM/RLB/JBF
03/2016

PRIDEEN SERIES

The Prideen series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed rocks and volcanic ash. Prideen soils are on alluvial flats and stream terraces. Slopes are 0 to 2 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, mesic Aquic Torriorthents

TYPICAL PEDON: Prideen silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 18 cm; light brownish gray (10YR 6/2) silt loam, dark grayish brown (10YR 4/2) moist; weak thin platy structure; hard, friable, slightly sticky and slightly plastic; many very fine and few fine roots; few very fine and fine vesicular pores; slightly alkaline (pH 7.5); clear smooth boundary. (5 to 25 cm thick)

Czy--18 to 38 cm; pale brown (10YR 6/3) silt loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and common fine roots; many very fine and common fine tubular pores; common fine very pale brown (10YR 8/2) filaments and soft masses of gypsum and soluble salts; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary (10 to 30 cm thick).

Cy1--38 to 64 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; massive; hard, friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine tubular pores; few very fine very pale brown (10YR 8/2) filaments and soft masses of gypsum; slightly effervescent; slightly alkaline (pH 7.8); abrupt smooth boundary. (20 to 40 cm thick)

Cy2--64 to 91 cm, light gray (2.5Y 7/2) silty clay loam, grayish brown (2.5Y 5/2) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine and few fine roots; common very fine and fine tubular pores, mainly exped; few fine very pale brown (10YR 8/2) filaments and crystals of gypsum; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary. (10 to 35 cm thick)

Cqy1--91 to 117 cm; light gray (2.5Y 7/2) silty clay loam, grayish brown (2.5Y 5/2) moist; few fine and medium distinct yellowish brown (10YR 5/4) iron redox concentrations, very dark grayish brown (10YR 3/2) moist; moderate medium and fine angular blocky structure; very hard, firm, moderately sticky and moderately plastic; common very fine and few fine roots; few very fine and fine tubular pores; common thin silica films in pores and on some faces of peds; 20 percent weakly cemented durinodes; few fine distinct very pale brown (10YR 8/2) gypsum and soluble salt filaments; slightly effervescent; slightly alkaline (pH 7.8); abrupt smooth boundary. (15 to 40 cm thick)

Cqy2--117 to 155 cm; light gray (2.5Y 7/2) silty clay loam, grayish brown (2.5Y 5/2) moist; strong medium angular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine roots; common very fine and few fine tubular pores; 20 percent discontinuous weakly silica cemented lenses; few fine distinct very pale brown (10YR 8/2) gypsum crystals; common crustacean shells; slightly effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Humboldt County, Nevada; approximately 2.5 miles south of the Winnemucca Municipal Airport; about 300 feet north and 100 feet west of the southeast corner of section 34, T. 35 N., R. 37 E.; USGS Rose Creek Mountain 7.5 minute topographic quadrangle; latitude 40 degrees 51 minutes 30 seconds N and longitude 117 degrees 47 minutes 42 seconds W; WGS84 Decimal Degrees 40.8583333 latitude, -117.7950000 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated within a depth of 60 to 90 cm during the winter through early summer of most years.
Mean annual soil temperature: 8 to 11 degrees C.
Depth to a Cqy horizon: 38 to 97 cm.
Salts: Slightly to strongly salt affected. Some pedons have salt crystals in the upper subhorizons.
Sodicity (SAR): Less than 15 in half or more of the upper 50 cm.
Redoximorphic features: The low chroma matrix colors or redoximorphic depletions occur within 100 cm.
Other features: Unconformable lacustrine material when present is at 76 to 150 cm.

Particle-size control section - Clay content: 20 to 35 percent.

A horizon
Value: 6 or 7 dry, 4 through 6 moist.
Chroma: 2 or 3.
Reaction: Neutral through very strongly alkaline.
Effervescence: Noneffervescent through strongly effervescent.

Cyz horizon
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 2 through 4.
Consistence: Soft or slightly hard dry, nonsticky or slightly sticky and nonplastic or slightly plastic wet.
Reaction: Slightly alkaline through strongly alkaline.
Salt: 0.5 to 2 percent soluble salts.

Cy and Cqy horizons
Hue: 10YR, 7.5YR or 2.5Y.
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 2 through 4.
Texture: Silt loam or silty clay loam.
Structure: Platy, blocky or is massive
Consistence: Slightly hard to very hard dry, very friable to very firm moist, slightly sticky or sticky and slightly plastic or plastic wet.
Reaction: Slightly alkaline through strongly alkaline.

Cq horizons (when present)
Hue: 10YR, 7.5YR or 2.5Y.
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 1 through 4.
Texture: Silt loam or silty clay loam.
Structure: Platy, blocky or is massive
Consistence: Slightly hard to very hard dry.
Cementation: 20 to 50 percent discontinuous weak silica cementation, few to many silica films in pores and on peds in a firm matrix, or 20 to 50 percent durinodes in a friable matrix. Subhorizons below 100 cm of some pedons may be continuously weakly brittle matrix.

COMPETING SERIES: These are the Ixian and Nilda series.

Ixian and Nilda soils lack silica cementation.

GEOGRAPHIC SETTING: Prideen soils are on alluvial flats, channels, lake plains, stream terraces and flood plains. These soils formed in alluvium derived from mixed sedimentary, metamorphic and volcanic rocks, and volcanic ash with lacustrine material common in some pedons. Slopes are 0 to 2 percent. Elevations are 1,220 to 1,525 meters. The climate is cool, semiarid with cool, moist winters and hot, dry summers. The mean annual precipitation is 180 to 230 mm, mean annual temperature is 7 to 10 degrees C, and the frost-free season is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bubus, Raglan and Wendane soils. Bubus soils are coarse-loamy. Raglan soils are fine-loamy. Wedane soils have an SAR of 15 to 70 percent in more than half of the upper 50 cm.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; very slow runoff; moderately low saturated hydraulic conductivity. Seasonal water table is 60 to 90 cm.

USE AND VEGETATION: Rangeland, wildlife habitat, irrigated hayland. The present vegetation is mainly shadscale, black greasewood, seepweed, basin wildrye, and bottlebrush squirreltail.

DISTRIBUTION AND EXTENT: North central Nevada. These soils are not extensive. MLRA 24.

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

SERIES PROPOSED: Humboldt County, Nevada, 1993.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone the soil surface to 18 cm (A horizon)
Redoximorphic features - Reduced matrix with low chroma colors and saturation. (Cqy1 and Cqy2 horizons)
Seasonal water table - Within 60 to 90 cm.
Duric features - The zone from 91 to 117 cm (Cqy1 horizon)
Particle size control section - the zone from 25 to 100 cm (part of the Czy, Cy1, Cy2 and part of the Cqy1 horizons).

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National Cooperative Soil Survey
U.S.A.