LOCATION PRIDA                   NV

Established Series
Rev. CEJ-RLB-JBF
05/2016

PRIDA SERIES

The Prida series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed rocks and volcanic ash. The Prida soils are on alluvial flats, channels, lake plains, flood plains 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 Oxyaquic Torriorthents

TYPICAL PEDON: Prida silt loam--rangeland. (Colors are for dry soil unless otherwise noted.) 0.2 to 0.6 cm thick salt crust on the soil surface.

A--0 to 13 cm; light gray (10YR 7/2) silt loam, brown (10YR 4/3) moist; strong very thin, thin and medium platy structure; slightly hard, very friable, slightly sticky and moderately plastic; common very fine, few fine and medium vertical and horizontal roots; many very fine vesicular, interstitial and tubular pores; strongly effervescent; strongly alkaline (pH 8.8); abrupt wavy boundary. (8 to 23 cm thick)

Cyz--13 to 18 cm; very pale brown (10YR 8/3) loamy sand, pale brown (10YR 6/3) moist; massive; soft, very friable, nonsticky and nonplastic; very few very fine through medium roots; many very fine vesicular, interstitial and tubular pores; a horizontal lense of hard, firm, 1 to 5 cm thick layer of salt crystals; common fine gypsum filaments; strongly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary. (5 to 25 cm thick)

Cy--18 to 58 cm; very pale brown (10YR 7/3) silt loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; many very fine random, few fine and medium vertical and oblique roots; common very fine tubular pores; about 5 percent weak, 4 to 20 mm, durinodes; few fine gypsum filaments and threads; strongly effervescent; strongly alkaline (pH 8.6); gradual smooth boundary. (15 to 53 cm thick)

Cqy--58 to 97 cm; light gray (10YR 7/2) silt loam, yellowish brown (10YR 5/4) moist; common medium distinct iron concentrations yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, slightly sticky and moderately plastic; few very fine and fine random roots; many very fine and fine tubular pores; about 25 percent weak and moderately strong, 15 to 30 mm durinodes; common fine gypsum concretions; strongly effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (15 to 38 cm thick)

2Cqk1--97 to 119 cm; very pale brown (10YR 8/2) silt loam, yellowish brown (10YR 5/4) moist; common medium distinct iron mottles light brown (7.5YR 6/4) and brown (7.5YR 4/4) moist; weak thin platy structure; hard, very friable, moderately sticky and moderately plastic; very few very fine and fine random roots; many very fine and few fine tubular pores; common thin reoriented silt coatings lining pores; 25 percent discontinuous very weakly silica-cemented masses; 10 percent weak, 5 to 20 mm durinodes; violently effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (0 to 38 cm thick)

2Cqk2--119 to 145 cm; light gray (10YR 7/1) and very pale brown (10YR 8/2) silt loam, yellowish brown (10YR 5/4) moist; many fine distinct iron concentrations, dark brown (7.5YR 3/2) moist; massive; hard, friable, sticky and plastic; very few very fine random roots; many very fine and very few fine tubular pores; 25 percent discontinuous weakly silica and carbonate cemented masses; 20 percent weak and moderately strong, 5 to 15 mm durinodes; violently effervescent; strongly alkaline (pH 8.6); gradual smooth boundary. (0 to 30 cm thick)

3Cq--145 to 157 cm; light gray (10YR 7/1) and white (10YR 8/1) silt loam, pale brown (10YR 6/3) moist; many fine distinct brown (7.5YR 5/4) iron concentrations, dark brown (7.5YR 3/2), brown (7.5YR 4/2) moist; massive; hard, friable and firm, slightly sticky and slightly plastic; many very fine and very few fine tubular pores; continuous weak and very weak silica cementation; violently effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Lander County, Nevada, about 6 miles southeast of Battle Mountain, approximately 2,000 feet south and 45 feet west of the northeast corner of section 16, T. 31 N., R. 45 E.; USGS Blossom Spring, NV 7.5 minute topographic quadrangle; latitude 40 degrees 33 minutes 38 seconds N and longitude 116 degrees 54 minutes 02 seconds W; WGS84 Decimal Degrees 40.5605556 latitude, -116.900833 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated within a depth of 100 to 150 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.
Sodium: Less than 15 in half or more of the upper 50 cm.
Redoximorphic concentrations: Occur below 50 cm in most pedons.
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 moderately sticky and slightly plastic or moderately plastic wet.
Reaction: Slightly alkaline to strongly alkaline.

Cqk and Cq horizons
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, very friable to very firm, moist.
Reaction: Moderately alkaline or strongly alkaline.
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 have a continuously brittle matrix.

COMPETING SERIES: These are the Needle Peak and Parowan series.

Needle Peak and Parowan soils have do not have silica accumulation and do not have weak continuous brittle matrix.

GEOGRAPHIC SETTING: Prida 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 Sonoma and Wendane soils. Sonoma and Wendane soils have are saturated above 100 cm during part of the year.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; very slow runoff; moderately high saturated hydraulic conductivity. Seasonal high water table is 100 to 150 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, 27.

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

SERIES ESTABLISHED: Humboldt County, Nevada, (BLM Sonoma Planning Unit), 1974.

REMARKS: This soil was reclassified from Aquic Durorthidic Torriorthents to an Oxyaquic Torriorthents in 1993 as a result of recent changes in Taxonomy.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 18 cm (The A and part of the Cyz horizons).
Duric horizon - The zone from 58 to 147 cm (Cqy, 2Cqk1 and 2Cqk2 horizons).
Seasonal water table - Within 100 to 150 cm.
Particle-size control section - The zone from 25 to 100 cm (Cqy and portions of the Cy and 2Cqk1 horizons).

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National Cooperative Soil Survey
U.S.A.