LOCATION NAILKEG OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Typic Dystrudepts
TYPICAL PEDON: Nailkeg very channery loam - woodland, on a 7 percent slope at an elevation of 2,600 feet. (When described on May 8, 1990 the soil profile was moist throughout. Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed needles, leaves, twigs and woody materials.
A--1 to 7 inches; dark brown (10YR 4/3) very channery loam, light yellowish brown (10YR 6/4) dry; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine, and few medium and coarse roots; many fine and very fine tubular pores; 35 percent channers and 5 percent flagstones; strongly acid (pH 5.2); clear smooth boundary. (5 to 9 inches thick)
Bw1--7 to 16 inches; dark yellowish brown (10YR 4/4) very channery loam, light yellowish brown (10YR 6/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine, and few medium and coarse roots; many fine and very fine tubular pores; 30 percent channers and 10 percent flagstones; strongly acid (pH 5.4); clear smooth boundary.
Bw2--16 to 28 inches; yellowish brown (10YR 5/4) very channery clay loam, light yellowish brown (10YR 6/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine, common medium, and few coarse roots; common fine tubular pores; 40 percent channers and 15 percent flagstones; strongly acid (pH 5.4); abrupt wavy boundary. (Combined thickness of the Bw horizon is 15 to 31 inches)
R--28 inches; schist.
TYPE LOCATION: Curry County, Oregon; located about 1,950 feet north and 2,480 feet west of the southeast corner of section 7, T. 35 S., R. 12 W. (Latitude 42 degrees, 33 minutes, 33 seconds N.; Longitude 124 degrees, 10 minutes, 24 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 54 degrees F. The soils are usually moist but are dry less than 45 consecutive days between 4 and 12 inches in the four months following the summer solstice. The particle-size control section averages 20 to 30 percent clay and has 35 to 65 percent total rock fragments. Depth to bedrock and solum thickness is 20 to 40 inches. Hue is 10YR or 7.5YR.
The A horizon has value of 4 or 5 moist, 5 or 6 dry and chroma of 3 or 4 moist and dry. It is very channery loam with l0 to 25 percent clay. It has 35 to 50 percent channers and 0 to 5 percent flagstones.
The Bw horizon has value of 4 or 5 moist, 6 or 7 dry and chroma of 4 to 6 moist and dry. It is very channery loam, very channery clay loam, or extremely channery loam with 20 to 30 percent clay. It has 25 to 50 percent channers and 10 to 15 percent flagstones.
COMPETING SERIES: These are the Annisquam, Berks, Blasdell, Brownsville, Calvin, Cardiff, Chamate, Chenango, Dekalb, Greenlee, Hazleton, Highsplint, Lippitt, Manlius, Northcove, Oquaga, Parker, Peaks, Remote, Sylco, Tunkhannock, Warwick, Watt, and Wyoming series. Annisquam, Blasdell, Brownsville, Cardiff, Chamate, Chenango, Greenlee, Hazleton, Highsplint, Itswoot, Northcove, Parker, Remote, Tunkhannock, Warwick, and Wyoming soils are greater than 40 inches deep to bedrock. Berks, Calvin, Peaks, and Sylco soils have a mean annual soil temperature greater than 54 degrees F. Dekalb soils have less than 18 percent clay in the particle-size control section. Lippitt soils are 20 to 40 inches deep to a paralithic bedrock contact. Manlius and Oquaga soils are formed in glacial till and have more than 40 percent silt in the Bw horizons. In addition, Oquaga soils have less than 18 percent clay in the particle-size control section. Watt soils have chroma of 3 or less in the Bw horizon.
GEOGRAPHIC SETTING: Nailkeg soils occur on metastable broad ridgetops and slump benches, and on metastable to active side slopes of mountains. Slopes are 0 to 90 percent. The soils formed in colluvium and residuum derived from schist or phyllite rock types of the Colebrooke Schist Formation. Elevations are 200 to 3,000 feet. The climate is characterized by warm, wet winters and hot, moist summers. The mean annual precipitation is 90 to 130 inches. The mean annual temperature is 45 to 53 degrees F. The frost-free period is 120 to 210 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Barkshanty (T), Deadline (T), Edson, and Irma (T) soils. All of these soils occur on broad ridgetops, benches, or side slopes of mountains. Barkshanty and Edson soils have argillic horizons. Deadline soils are 40 to 60 inches deep to bedrock. Irma soils are fine-loamy.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Nailkeg soils are used for timber production, watershed, recreation, and wildlife habitat. The native vegetation is Douglas fir, western hemlock, red alder, Port-Orford cedar, tanoak, Pacific madrone, canyon live oak, cascade Oregongrape, salal, Pacific rhododendron, evergreen huckleberry, hairy manzanita, western swordfern, common beargrass, western princes pine, and western rattlesnake plantain.
DISTRIBUTION AND EXTENT: Mountainous areas of southwestern Oregon; MLRA 1. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Curry County, Oregon; 1995.
REMARKS: Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon.
Cambic horizon - from a depth of 7 to 28 inches (Bw1 and Bw2 horizons).
Particle-size control section - from 11 to 28 inches (part of Bw1, and the Bw2 horizons) with a weighted average of 48 percent rock fragments.