LOCATION HUYSINK CAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Xeric Haplohumults
TYPICAL PEDON: Huysink very stony loam--on a west facing slope of 20 percent under mixed conifers and black oak at 5,100 feet elevation. (Colors are for dry soil unless otherwise stated. When described on 8/28/77 the soil was dry throughout).
01--1 to 0 inches; fresh and decomposed needles and leaves.
A11--0 to 2 inches; dark yellowish brown (10YR 4/4) very stony loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and slightly plastic; common very fine and fine roots; many very fine interstitial and few fine tubular pores; 15 percent pebbles, 5 percent cobbles, 25 percent stones; slightly acid (pH 6.5); abrupt smooth boundary. (5 to 11 inches thick)
A12--2 to 7 inches; brown (7.5YR 4/4) very stony loam, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine interstitial and few fine tubular pores; 10 percent pebbles, 10 percent cobbles, 25 percent stones; slightly acid (pH 6.5); clear wavy boundary. (0 to 7 inches thick)
B1t--7 to 14 inches; strong brown (7.5YR 5/6) very stony loam, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine interstitial and few fine tubular pores; common thin clay films in pores; 20 percent pebbles, 10 percent cobbles, 25 percent stones; slightly acid (pH 6.5); clear wavy boundary. (0 to 11 inches thick)
B21t--14 to 29 inches; strong brown (7.5YR 5/6) extremely stony loam, dark brown (7.5YR 3/4) moist; medium subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; many very fine and fine, common medium roots; many very fine interstitial and common fine tubular pores; common thin clay films in pores; 50 percent pebbles, 10 percent cobbles, 25 percent stones; medium acid (pH 6.0); clear wavy boundary. (12 to 17 inches thick)
B22t--29 to 41 inches; reddish yellow (7.5YR 6/6) very stony loam, dark brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common medium and coarse roots; many very fine interstitial and common fine tubular pores; common thin clay films on peds and in pores; 30 percent pebbles, 5 percent cobbles, 25 percent stones; medium acid (pH 5.7); abrupt wavy boundary. (12 to 20 inches thick)
B31t--41 to 58 inches; brownish yellow (10YR 6/6) very stony loam, dark yellowish brown (10YR 4/6) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common medium and few coarse roots; common very fine and fine tubular pores; common thin clay films on peds and in pores; 30 percent pebbles, 5 percent cobbles, 25 percent stones; strongly acid (pH 5.5); clear wavy boundary. (0 to 20 inches thick)
B32t--58 to 69 inches; yellow (10YR 7/6) extremely stony loam, yellowish brown (10YR 5/6) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common medium and few coarse roots; common very fine and fine tubular pores; common thin clay films on peds and in pores; 35 percent pebbles; 5 percent cobbles, 25 percent stones; very strongly acid (pH 4.5).
TYPE LOCATION: Placer County, Tahoe National Forest, California; 1.9 mile south of Emigrant Gap, 1.2 miles along road from Sailor Point to Carpenter Flat, west end of clear cut, 150 meters west of road. 200 meters north of center of NW 1/4 of sec. 7, T.16N., R.12E., MDB&M.
RANGE IN CHARACTERISTICS: The solum is 42 to 69 inches thick. Cobbles and stones make up 5 to 35 percent and gravel from 10 to 50 percent of the profile. The soil between depths of 10 and 34 inches is moist in some part for 160 to 180 days from October 15 to May 1. It is dry in all parts for 60 to 90 days from July 1 to October 1. Mean annual soil temperature varies from 48 degrees to 55 degrees F.
The A horizon has dry color of 10YR 4/3, 4/4, 5/3, 5/4; 7.5YR 4/2, 4/4, 5/2 and 5/4 and moist color of 10YR 3/2, 3/3, 3/4, 4/3, 4/4; 7.5YR 4/2, 4/4 and 3/2. Moist chroma of 4 occurs within the upper 7 inches of the A horizon. It is slightly acid to medium acid.
The B2t horizon has dry color of 10YR 6/6, 6/8, 7/6; 7.5YR 5/6, 5/8, 6/6, 6/8 and 7/8. It has moist color of 10YR 5/6, 5/8; 7.5YR 4/4, 5/6, 5/8, 6/6 and 6/8. It is loam or sandy clay loam with 35 to 80 percent rock fragments. It is massive or has subangular blocky structure. It is medium to very strongly acid.
COMPETING SERIES: These are the Horseshoe and Seaquest (T) series in another family. Horseshoe and Seaquest soils have less than 35 percent rock fragments in the particle size control section.
GEOGRAPHIC SETTING: Huysink soils are on gently sloping to very steep glacial terraces and moraines at elevations of 4,500 to 5,500 feet. They formed in material weathered from glacial till from mixed sources. The climate is typified by warm dry summers and cool moist winters. The mean annual precipitation varies from 50 to 70 inches, some of which occurs as snow. The mean annual temperature is 51 degrees F. The average frost-free season varies from 100 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the competing Horseshoe series.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderate permeability.
USE AND VEGETATION: Used for commercial timber production, wildlife habitat, watershed and recreation. Vegetation is ponderosa pine, Douglas-fir, incense-cedar, white fir, sugar pine and black oak.
DISTRIBUTION AND EXTENT: Northern part of the Sierra Nevada Range of California. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES PROPOSED: Nevada County (Tahoe National Forest Area); California, 1981.
ADDITIONAL DATA: This pedon was sampled by the SCS National Soil Survey Laboratory, Lincoln, Nebraska in 1977. Pedon number is S77-CA-061-002-1 through 7.
OSED scanned by SSQA. Last revised by state on 3/81.