LOCATION HAYPRESS                CA+NV

Established Series
Rev. HRS/GMK/JJJ/JBF
03/2017

HAYPRESS SERIES

The Haypress series consists of deep, somewhat excessively drained soils that formed in colluvium and residuum derived from granitic rocks. Haypress soils are on mountain sideslopes. Slopes range from 2 to 75 percent. The mean annual precipitation is about 460 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Mixed, frigid Psammentic Haploxerolls

TYPICAL PEDON: Haypress loamy coarse sand - woodland - on a SW facing slope of 5 percent under Jeffery pine and perennial grasses at 1,525 meters elevation. (Colors are for dry soil unless otherwise noted.)

Oi--0 to 8 cm; fresh and partly decomposed litter of pine needles, twigs and leaves; abrupt smooth boundary. (0 to 10 cm thick)

A1--8 to 18 cm; grayish brown (10YR 5/2) loamy coarse sand, very dark gray (10YR 3/1) moist; weak thick platy structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; common very fine, fine and medium roots; common very fine tubular and interstitial pores; moderately acid (pH 6.0); clear smooth boundary.

A2--18 to 43 cm; grayish brown (10YR 5/2) loamy coarse sand, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine roots, many medium and coarse roots; common very fine, few medium tubular and interstitial pores; moderately acid (pH 6.0); clear smooth boundary. (The combined thickness of the A horizon is 25 to 46 cm.)

AC--43 to 79 cm; brown (10YR 5/3) loamy coarse sand, dark brown (10YR 3/3) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many medium and coarse roots; common very fine tubular, and interstitial pores; moderately acid (pH 6.0); gradual smooth boundary. (30 to 40 cm thick)

C--79 to 132 cm; pale brown (10YR 6/3) loamy coarse sand, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and nonplastic; many medium and coarse roots; common very fine, few medium tubular, common very fine interstitial pores; moderately acid (pH 6.0); clear smooth boundary. (40 to 76 cm thick)

Cr--132 to 178 cm; Weathered granite, crushes to pale brown (10YR 6/3) loamy coarse sand, brown (10YR 4/3) moist; massive; hard, firm, nonsticky and nonplastic; moderately acid (pH 6.0).

TYPE LOCATION: Sierra County, California; 2.5 miles NE of village of Calpine; 1,100 feet SW of E1/4 corner of section 4, T. 21 N., R. 14 E.; USGS Calpine 7.5 minute topographic quadrangle; latitude 39 degrees 41 minutes 59 seconds N and longitude 120 degrees 24 minutes 41 seconds W; WGS84 Decimal Degrees 39.6997222 latitude, -120.4113889 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring and continuously dry in all parts for significant periods in summer and fall; xeric soil moisture regime.
Mean annual soil temperature: 7 to 8 degrees C.
Mollic epipedon: 25 to 46 cm.
Depth to bedrock: 50 to 100 cm.
Reaction: Moderately acid or slightly acid.

Particle-size control section - Texture: Loamy coarse sand and gravelly loamy coarse sand.

A horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3 dry, 1 through 3 moist.

COMPETING SERIES: This is the Engett series.

Engel soils have a neutral or slightly alkaline reaction.

GEOGRAPHIC SETTING: Haypress soils are on sideslopes of hills and mountains in concave positions at elevations of 1,525 to 2,445 meters. Slopes range from 2 to 75 percent. They formed in colluvium and residuum derived from granitic rocks. Rock outcrops are common. The climate is cool subhumid with warm dry summers and cold moist winters. The mean annual precipitation is 360 to 600 mm. The mean annual temperature is 7 to 8 degrees C. The frost-free season is about 30 to 80 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bonta, Delleker, Portola, Toiyabe and Trojan soils. Bonta and Delleker soils have ochric epipedons and argillic horizons. Portola soils have an exchange complex dominated by amorphous material and have a proportion of vitric material. Toiyabe soils are shallow. Trojan soils have an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat excessively drained; slow to very rapid runoff; rapid permeability; high saturated hydraulic conductivity.

USE AND VEGETATION: Used mostly for timber production and livestock grazing. Vegetation is mainly open stands of Jeffrey and Ponderosa pine with black oak, manzanita perennial and annual grasses, and some scattered big sagebrush and bitterbrush.

DISTRIBUTION AND EXTENT: Northeastern California and northwestern Nevada. The soils are of small extent. MLRA 23 and 26.

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

SERIES ESTABLISHED: Sierra County, California, 1973.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from the mineral surface to 43 cm (A1 and A2 horizons).
Paralithic contact - The boundary at 132 cm (Cr horizon).
Particle-size control section - The zone from 33 to 108 cm (AC and part of the A2 and C1 horizons).

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National Cooperative Soil Survey
U.S.A.