LOCATION RESCUE CAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Mollic Haploxeralfs
TYPICAL PEDON: Rescue sandy loam - annual range. (Colors are for dry soil unless otherwise noted.)
Al--0 to 5 inches; reddish brown (5YR S/4) sandy loam, dark reddish brown (5YR 3/4) moist; massive; slightly hard, friable, slightly sticky, slightly plastic; many very fine, common fine roots; many very fine tubular and interstitial, few fine tubular pores; moderately acid (pH 6.0); clear smooth boundary. (4 to 6 inches thick)
A3--5 to 10 inches; reddish brown (5YR 4/4) sandy loam, dark reddish brown (5YR 3/4) moist; massive; slightly hard, friable, slightly sticky, slightly plastic; many very fine, common fine roots; many very fine tubular pores; slightly acid (pH 6.2); clear wavy boundary. (2 to 7 inches thick)
Blt--10 to 14 inches; yellowish red (5YR 4/6) heavy sandy loam, yellowish red (5YR 3/6) moist; massive; hard, friable, sticky, plastic; common very fine and fine roots; common very fine tubular pores; many thin clay films line pores and as bridges; slightly acid (pH 6.2); gradual smooth boundary. (2 to 8 inches thick)
B2t--14 to 26 inches; yellowish red (5YR 4/6) sandy clay loam, dark red (2.5YR 3/6) moist; massive; extremely hard, firm, sticky, plastic; few fine, medium and coarse roots; few very fine and fine tubular pores; many moderately thick clay films line pores; slightly acid (pH 6.4); gradual smooth boundary. (7 to 14 inches thick)
B31t--26 to 34 inches; reddish yellow (5YR 6/8) heavy sandy loam, variegated reddish brown and reddish yellow (5YR 4/4, 6/6) moist; massive; extremely hard, firm, sticky, plastic; few fine, medium and coarse roots; few very fine tubular and interstitial pores; many thin clay films line pores and as bridges; slightly acid (pH 6.5); clear wavy boundary. (5 to 14 inches thick)
Cl--34 to 55 inches; reddish yellow (5YR 7/8) coarse sandy loam, yellowish red (5YR 5/6) moist; massive; very hard, firm, slightly sticky, slightly plastic; few fine, medium and coarse roots; few very fine tubular and interstitial pores; few thin clay films line pores and as bridges; slightly acid (pH 6.5); clear wavy boundary. (10 to 22 inches thick)
C2--55 to 66 inches; very pale brown (lOYR 7/4) loamy coarse sand, strong brown (7.5YR 5/6) moist; massive; slightly hard, firm, nonsticky, nonplastic; few fine, medium and coarse roots; few and very fine tubular and interstitial pores; slightly acid (pH 6.5).
TYPE LOCATION: El Dorado County, California; 2.0 miles north of Bass Lake, 50 feet east of Deer Valley Road, near center of NE114 SE1/4 of sec. 19, T.lON., R.9E.
RANGE IN CHARACTERISTICS: The solum is 30 to 70 inches thick. Depth to a paralithic contact of weathered rock is 40 to 80 inches. Mean annual soil temperature at a depth of 20 inches is 59 degrees to 65 degrees F. Coarse fragments in the profile range from about 3 to 25 percent. The larger amounts are in the upper A horizon or in the C horizon. Between the depths of about 5 and 15 inches the soils are usually continually moist but become dry in May or early June and remain dry all the time until sometime in October or early November. The soils are usually slightly or moderately acid throughout, but are neutral in the lower part of some pedons.
The A horizon is reddish brown or brown in hue of 7.5YR or 5YR. Moist chromas are 4 or more below a depth of 4 inches, or are 4 or more in all parts. It has 3 to 8 percent organic matter in the upper 4 inches and drops to levels of 0.5 to 1.5 percent at a depth of 10 inches. It is sandy loam or loam. Its lower boundary is gradual or there is either one or both an A3 horizon and a Bl horizon.
The B2t horizon is red, reddish brown, yellowish red or reddish yellow ln hue of 2.5YR or 5YR. It is clay loam or sandy clay loam with 27 to 35 percent clay and has 10 to 20 percent total coarse and very coarse sand. It averages 75 to 85 percent base saturation.
COMPETING SERIES: These are the Academy, Blasingame, Burchell, Cajalco, Coarsegold, Honn, Jacinto, Los Robles, Marguerite, Modesto, Ojai, Pachappa, Perkins, Pleasanton, Sobrante, Trimmer, Whitney and Wyo series. Academy soils have sandstone at depths of 19 to 39 inches. Burchell, Jacinto, Marguerite, Pachappa and Wyo soils have no hue redder than lOYR, and Los Robles, Honn, Modesto and Pleasanton soils have no hue redder than 7.5YR in the B2t horizon. Blasingame soils have less than 1 percent organic matter ln all parts of the A horizon. Cajalco and Trimmer soils have a paralithic contact above 40 inches. Coarsegold soils have less than 10 percent coarse and very coarse sand and are micaceous. Ojai soils have very hard dry consistence in the Al horizon. Perkins soils have B2t horizons that are gravelly in the upper part and very gravelly in the lower part. Sobrante soils have a lithic contact above 40 inches. Whitney soils have a paralithic contact above 40 inches and no hue redder than 7.5YR.
GEOGRAPHIC SETTING: Rescue soils are on gently sloping to very steep uplands at elevations of 800 to 2,000 feet. They formed in residuum of gabbrodiorite rocks. Rock outcrops and stones are present in some units. The climate is moist subhumid with hot dry summers and cool moist winters. Annual precipitation 18 25 to 45 inches. Mean annual temperature ls about 59 degrees F., average January temperature about 44 degrees F., and the average July temperature about 75 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Argonaut, Auburn, and Boomer soils and the competing Sobrante soils. Argonaut soils have more than 35 percent clay in the argillic horizon. Auburn soils lack an argillic horizon and are less than 20 inches deep to rock in part of each pedon. Boomer soils have a mean soil temperature of less than 59 degrees F.
DRAINAGE AND PERMEABILITY: Well-drained; medium to very rapid runoff; moderately slow to slow permeability.
USE AND VEGETATION: Annual range and watershed. Some areas are irrigated and produce pasture and deciduous fruit. Native vegetation is annual and perennial grasses, brush, scattered conifers, and oaks.
DISTRIBUTION AND EXTENT: Mainly on the western slopes of the Sierra Nevada range. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Nevada County, California, 1970.
REMARKS: The Rescue soils were formerly classified as Brunlzems.
The activity class was added to the classification in January of 2003. Competing series were not checked at that time. - ET
OSED scanned by SSQA. Last revised by state on 4/71.