LOCATION ZING OREstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, mesic Aquultic Haploxeralfs
TYPICAL PEDON: Zing loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--1.5 inch to 0; loose, undecomposed and partially decomposed needles, twigs, leaves and moss.
A--0 to 6 inches; very dark brown (7.5YR 2/2) loam, dark brown (7.5YR 4/2) dry; moderate medium granular structure; soft, friable, slightly sticky and slightly plastic; many very fine and fine roots; many irregular pores; moderately acid (pH 5.8); clear smooth boundary. (3 to 12 inches thick)
BA1--6 to 12 inches; dark brown (10YR 3/3) clay loam, brown (10YR 5/3) dry; moderate fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many fine and medium roots; common very fine and fine pores; moderately acid (pH 5.6); clear wavy boundary. (3 to 10 inches thick)
BA2--12 to 16 inches; brown (10YR 4/3) clay loam, pale brown (10YR 6/3) dry; moderate fine subangular blocky structure; friable, slightly hard, sticky and plastic; common very fine and fine roots; common very fine pores; common reddish brown and black stains on peds; strongly acid (pH 5.2); clear wavy boundary. (0 to 8 inches thick)
2Bt1--16 to 28 inches; light olive brown (2.5Y 5/4) clay, pale olive (5Y 6/3) dry; few fine distinct yellowish brown and grayish brown (10YR 5/6, 5/2) mottles; moderate coarse prismatic structure; very hard, firm, very plastic and very sticky; few very fine roots; common fine and very fine pores; few faint clay films on peds and in some pores; neutral (pH 6.6); gradual wavy boundary. (10 to 20 inches thick)
2Bt2--28 to 36 inches; light olive brown (2.5Y 5/4) clay, pale yellow (5Y 7/3) dry; many medium distinct strong brown (7.5YR 5/6) and grayish brown (10YR 5/2) mottles; moderate medium subangular blocky structure; hard, firm, sticky, and plastic; common very fine pores; continuous distinct clay films on peds; very dark grayish brown film in root channels; neutral (pH 6.7); gradual smooth boundary. (0 to 15 inches thick)
2BCt--36 to 60 inches; light olive brown (2.5Y 5/4) clay loam, pale yellow (5Y 7/3) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; many black stains and concretions; common very fine pores; distinct clay films in some pores and cavities; neutral (pH 7.0).
TYPE LOCATION: Douglas County, Oregon,; SW1/4 SE1/4 section 21, T.28S., R.2E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F. The soils are usually moist but are dry in the control section for 45 to 70 consecutive days during the 4 month period following the summer solstice. There are moist during the winter. Depth to bedrock is 60 inches or more. The solum is 30 to 45 inches thick. It is moderately or strongly acid in the A and BA horizons and slightly acid or neutral in the 2Bt horizons. Depth to the 2Bt horizon is 10 to 30 inches.
The A horizon has hue of 7.5YR or 10YR, value of 2 or 3 moist, 4 or 5 dry, and chroma of 2 or 3 moist and dry.
The BA horizon has hue of 7.5YR to 2.5/Y, value of 3 or 4 moist, 4 to 6 dry and chroma of 2 to 4 moist and dry. It is loam, clay loam or silty clay loam with 25 to 35 percent clay.
The 2Bt horizon has hue dominantly of 5 Y or 2.5Y but ranging to 10YR, value of 4 or 5 moist, 6 or 7 dry, and chroma of 3 or 4, with faint to distinct mottles having chroma of 2 through 6. It is heavy silty clay loam, heavy clay loam or clay with 35 to 50 percent clay. This horizon has weak or moderate prismatic to weak or moderate subangular or angular blocky structure.
The 2C horizon is olive, brown and grayish brown with common to many black stains and concretions and with faint to distinct high chroma mottles in some pedons. It is loam or clay loam.
COMPETING SERIES: These are the Dupee, Gustin, Linslaw and Santiam series. Dupee soils have ochric epipedons and are strongly to very strongly acid in the B and C horizons. Gustin soils have ochric epipedons, have an E horizon and are very strongly to extremely acid in the B and C horizons. The Linslaw soils have ochric epipedons, are strongly to very strongly acid in the B and C horizons and have a clayey 2C horizon that is finer than the B horizon. Santiam soils have ochric epipedons, have a sola high in silt, the B horizon commonly has peds coated with clean silt and sand grains and have a clayey 2C horizon that is finer than the B horizon.
GEOGRAPHIC SETTING: The Zing soils have gently sloping to moderately steep slopes with gradients of 0 to 45 percent and are at elevations of 800 to 4,000 feet. The soils formed in colluvium and residuum weathered from metamophic, granitic and basic igneous rocks. The soils have subhumid climate with dry and warm summers and cool and wet winters. The mean annual precipitation is 35 to 60 inches; the mean annual temperature is about 45 to 52 degrees F.; and the mean July temperature is about 64 degrees F. The frost free season is from 100 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Lettia soil. Lettia soils are well drained and lack mottles.
DRAINAGE AND PERMEABILITY: Moderately well or somewhat poorly drained; slow permeability.
USE AND VEGETATION: The soil is used primarily for timber production, water supply, and wildlife. Present vegetation is mainly ponderosa pine, sugar pine, and Douglas fir with an understory of salal, oceanspray, snowberry, hazel, beargrass, and Oregon grape.
DISTRIBUTION AND EXTENT: West side of central and southern Cascade Mountains, Oregon. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Douglas County (South Umpqua Area), Oregon, 1974.
REMARKS: The activity class was added to the classification in March of 2003. Competing series were not checked at that time. - ET
ADDITIONAL DATA: Partial characterization data by Oregon State University, reported in the Soil Survey of the South Umpqua Area, Oregon, 1973.