LOCATION HATCHERY OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Dystric Eutrudepts
TYPICAL PEDON: Hatchery gravelly loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; mostly Douglas-fir needles and salal leaves; an 0e horizon one-fourth inch thick at the lower boundary.
A--1 to 10 inches; dark brown (7.5YR 3/2) gravelly loam, brown (7.5YR 4/4) dry; moderate very fine granular structure; friable, slightly sticky and slightly plastic; many roots; many fine and very fine irregular pores; 20 percent basalt gravel; slightly acid (pH 6.2); abrupt smooth boundary. (7 to 9 inches thick)
Bw1--10 to 22 inches; dark reddish brown (5YR 3/4) gravelly loam, yellowish red (5YR 5/6) dry; moderate very fine subangular blocky structure; friable, slightly sticky and slightly plastic; common roots; many fine and very fine irregular and tubular pores; 30 percent gravel; few cobbles; slightly acid (pH 6.5); gradual smooth boundary. (5 to 15 inches thick)
Bw2--22 to 33 inches; dark reddish brown (5YR 3/4) very gravelly loam; yellowish red (5YR 5/6) dry; weak very fine subangular blocky structure; friable, slightly sticky and slightly plastic; few roots; many fine and very fine irregular and tubular pores; 45 percent gravel and 10 percent cobbles; slightly acid (pH 6.4); abrupt irregular boundary. (5 to 15 inches thick)
R--33 inches; fractured basalt; soil material similar to the Bw horizon in fractures.
TYPE LOCATION: Benton County, Oregon; about 3 1/2 miles southeast of Alsea along the South Fork road and 30 feet north of the South Fork road and 50 yards east of the Hull-Oakes quarry and centered along the lower boundary of the S1/2 SE1/4 SW1/4 NE1/4 section 20, T. 14 S., R. 7 W., W.M.
RANGE IN CHARACTERISTICS: The average soil temperature is 52 to 54 degrees F. Solum thickness and depth to bedrock range from 20 to 40 inches. Rock fragments in the control section average 35 to 60 percent; in the lower part they range to 80 percent.
The A horizon has hue of 7.5YR or 5YR, value of 2 or 3 moist, 4 or 5 dry and chroma of 2 or 3 moist and 2 through 4 dry. It is commonly loam but ranges to clay loam in some pedons. This horizon has moderate or strong very fine to medium granular structure.
The Bw horizon has value of 4 or 5 dry and chroma of 4 through 6. Below depth of 20 inches it has value of 4 moist in some pedons. It is loam or clay loam with more than 18 percent clay. It has weak to moderate very fine to fine subangular blocky structure.
The C horizon, when present, is commonly lighter colored but ranges from dark reddish brown to reddish brown when moist. It has 70 to 85 percent rock fragments by volume.
COMPETING SERIES: This is the Digger series. Digger soils have hue yellower than 5YR and have a paralithic contact at depths of 20 to 40 inches. (see Remarks)
GEOGRAPHIC SETTING: The Hatchery soils are on ridges, smooth or dissected slopes of 25 to 85 percent in mountainous topography at elevations of 250 to 1,500 feet. The soil formed in medium or moderately fine textured very gravelly colluvium weathered from basic volcanic rock. The climate is modified maritime climate with an annual precipitation of 60 to 80 inches and with a short dry season during the summer. The mean annual temperature is 50 to 52 degrees F. The average January temperature is 42 degrees F., and the average July temperature is 62 degrees F. The frost-free period is 160 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Digger and Klickitat soils and the Kilchis and Honeygrove soils. Kilchis soils are less than 20 inches deep to bedrock. Honeygrove soils have smoother and less steeply sloping topography and have fine-textured argillic horizons.
DRAINAGE AND PERMEABILITY: Well-drianed; moderately rapid permeability.
USE AND VEGETATION: Used for timber production. Typically, the coniferous forest canopy is dominated by Douglas-fir with grand fir and Oregon oak present in small numbers. The understory is mixed shrubs and herbs with some combination of the following plants; poison-oak, salal, brackenfern, oceanspray, hazel, western dewberry, swordfern, grass and small numbers of other plants. The ocean spray-salal and vine maple-salal understory communities are common. On burned over areas, brackenfern, salal, oceanspray, hazel, and poison-oak are present in large numbers.
DISTRIBUTION AND EXTENT: Hatchery soils are in the western part of the central portion of the Oregon Coast Range. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Benton County, Oregon, 1974.
REMARKS: With the combining of the Benton County Area, Oregon and Alsea Area, Oregon soil survey portion within Benton County into the Benton County, Oregon update soil survey, the Hatchery series has been correlated into different soil series depending upon the mapping unit in which it occurred. Where it was mapped as a consociation unit in the Alsea survey the Hatchery soils have been correlated to the Harslow series; where it was mapped in complex with the Honeygrove series the Hatchery soils have been correlated to the Shivigny series. Currently, there is still a portion of the Alsea Area survey which has not been updated, and the Hatchery series is still recognized. Further investigation is needed in this area to determine if the Hatchery soils should be inactivated.
ADDITIONAL DATA: Partial characterization data reported for one pedon in the Soil Survey of the Alsea Area, Oregon, October, 1973.