LOCATION FREEZENER OREstablished Series
TAXONOMIC CLASS: Fine, mixed, superactive, mesic Ultic Haploxeralfs
TYPICAL PEDON: Freezener gravelly loam, forested. (Colors are for moist soil unless otherwise noted.)
O--1 inch to 0; very dark gray (10YR 3/1) partly decomposed needles, leaves, twigs; abrupt smooth boundary. (1/2 to 3 inches thick)
A--0 to 9 inches; dark reddish brown (10YR 3/3) gravelly loam, brown (7.5YR 5/2) dry; moderate fine and medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine to medium roots; many very fine and fine pores; common white mycelia on faces of peds; many fine dark reddish brown and black concretions; strongly acid (pH 5.4); clear smooth boundary. (4 to 9 inches thick)
BA--9 to 16 inches; reddish brown (5YR 4/3) clay, brown (7.5YR 5/4) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine to coarse roots; many very fine and fine pores; few fine dark reddish brown and black concretions; strongly acid (pH 5.2); clear smooth boundary. (6 to 18 inches thick)
Bt1--16 to 24 inches; reddish brown (5YR 4/4) silty clay, brown (7.5YR 5/4) dry; moderate medium and coarse subangular blocky structure; very hard, firm, sticky, plastic; few fine and very fine roots; common very fine and fine pores; nearly continuous moderately thick clay films on faces of peds and in pores; strongly acid (pH 5.2); gradual smooth boundary. (5 to 10 inches thick)
Bt2--24 to 32 inches; reddish brown (5YR 4/4) clay, strong brown (7.5YR 6/6) dry; strong medium and coarse subangular blocky structure; very hard, firm, sticky, plastic; few very fine roots; few very fine and fine pores; nearly continuous moderately thick clay films on faces of peds and in pores; strongly acid (pH 5.1); gradual smooth boundary. (5 to 10 inches thick)
Bt3--32 to 45 inches; reddish brown (5YR 4/4) clay, brown (7.5YR 5/4) dry; common faint yellowish red (5YR 5/6) mottles; strong medium and coarse subangular blocky structure; very hard, firm, sticky, plastic; few very fine roots; few very fine and fine pores; common moderately thick yellowish red (5YR 4/6) clay films on faces of peds and in pores; common medium black stains; very strongly acid (pH 5.0); gradual smooth boundary. (5 to 15 inches thick)
BCt--45 to 56 inches; reddish brown (5YR 4/4) clay loam, brown (7.5YR 5/4) dry; common fine distinct red (2.5YR 4/6) mottles; weak medium subangular blocky structure; hard, firm, slightly sticky, plastic; few very fine roots; few very fine pores; common thin clay films on peds; few fine black stains; strongly acid (pH 5.1); clear smooth boundary. (7 to 15 inches thick)
C--56 to 72 inches; reddish brown (5YR 4/4) cobbly clay loam, brown (7.5YR 5/4) dry; massive; hard, firm, slightly sticky, slightly plastic; few very fine and fine pores; 35 percent cobbles and stones; strongly acid (pH 5.1).
TYPE LOCATION: Douglas County, Oregon; near clear cut until 16 in Zinc Creek Road; NE1/4NE1/4 sec. 35, T. 29 S., R. 1 W.
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 60 to 90 consecutive days during the summer. The solum is 40 to 60 inches thick. The depth to bedrock is more than 60 inches.
The A horizon has hue of 2.5YR, 5YR or 7.5YR, value of 3 or 4 moist, 4 or 5 dry, and chroma of 2 through 4 moist and dry. It has 2 to 4 percent organic matter. It is strongly or moderately acid. It has moderate fine or medium granular and very fine or fine subangular blocky structure.
The Bt horizon has hue of 2.5YR, 5YR, or 7.5YR, value of 3 or 4 moist, 4 through 6 dry, and chroma of 4 through 6 moist and dry. It is clay loam, silty clay loam, silty clay or clay with 35 to 50 percent clay. It is strongly or very strongly acid. It has moderate or strong medium or coarse subangular blocky structure.
The C horizon is dark reddish brown to reddish brown cobbly clay loam or cobbly loam with 20 to 35 percent clay. It is strongly or very strongly acid.
COMPETING SERIES: These are the Cornutt, Jumpoff, Melbourne, Oak Grove, Rainier, and Veneta series. Cornutt soils have developed from serpentine and have Ca/Mg ratios of less than 1. Jumpoff soils have hue of 10YR to 5Y and are moderately well drained. Melbourne souls are dry 45 to 60 consecutive days and have a solum over 60 inches thick. Oak Grove and Rainier soils have an umbric epipedon. Veneta soils are moderately well drained and have mottles with chroma of 2 or less below 30 inches.
GEOGRAPHIC SETTING: The Freezener soils are on mountains at elevations of about 1,500 to 4,000 feet. Slopes are 0 to 65 percent. The soils formed in colluvium and residuum weathered from basic igneous rock, mostly basalt, dolerite, and some andesite. The mean annual precipitation is 30 to 60 inches. The mean annual temperature is 45 to 52 degrees F, the mean July temperature is 64 degrees F, and the mean January temperature is 30 degrees F. The frost-free period is 100 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Geppert, Coyata and Zing soils. Geppert and Coyata soils are loamy-skeletal and are 20 to 40 inches to bedrock. Zing soils are somewhat poorly drained and fine textured.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderately slow permeability.
USE AND VEGETATION: Timber production and livestock grazing. Present vegetation is white fir, Douglas fir, sugar pine, ponderosa pine, incense cedar, Pacific madrone, cascade Oregongrape, whipplevine and vanillaleaf.
DISTRIBUTION AND EXTENT: West side of central and southern Cascade Mountains, Oregon. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: South Umpqua Area, Douglas County, 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: Characterization data on 2 profiles (S60-Oreg-10-3 and S59 Oreg-10-3) reported in the Riverside Soil Survey Laboratory Report for Soils from South Umpqua Area, Douglas County, Oregon, May 1965.