LOCATION YAQUINA OR+WA
Established Series
Rev. AON/TDT/RWL
02/2011
YAQUINA SERIES
The Yaquina series consists of very deep, somewhat poorly drained soils that formed in mixed alluvium. These soils are on terraces and have slopes of 0 to 5 percent. The average annual precipitation is about 70 inches and the average annual temperature is about 51 degrees F.
TAXONOMIC CLASS: Sandy, isotic, isomesic Typic Endoaquods
TYPICAL PEDON: Yaquina loamy fine sand, grassland. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; partially decomposed grass, leaves, and moss.
E--1 to 7 inches; gray (10YR 5/1) loamy fine sand, light gray (10YR 7/1) dry; single grain; loose; many very fine, fine and medium roots; many very fine irregular pores; very strongly acid (pH 4.8); clear wavy boundary. (4 to 8 inches thick)
Bs1--7 to 15 inches; dark grayish brown (2.5Y 4/2) fine sand, light brownish gray (2.5Y 6/2) dry; many olive brown and light olive brown sand grains; single grain; loose; common very fine, fine and medium roots; many very fine irregular pores; common firm yellowish red (iron-cemented) nodules; very strongly acid (pH 5.0); gradual wavy boundary. (6 to 12 inches thick)
Bs2--15 to 31 inches; grayish brown (2.5Y 5/2) fine sand, light brownish gray (2.5Y 6/2) dry; few olive brown (2.5Y 4/4) sand grains; single grain; loose; few fine roots; many very fine irregular pores; common coarse faint and few medium distinct pale brown (10YR 6/3) and yellowish brown (10YR 5/6) masses of iron accumulation; common medium and fine soft yellowish red (iron-cemented) nodules; strongly acid (pH 5.4); gradual wavy boundary. (12 to 20 inches thick)
C--31 to 61 inches; variegated light olive brown (2.5Y 5/4), pale brown (10YR 6/3), dark reddish gray (5YR 4/2), and pinkish gray (5YR 6/2) fine sand; single grain; loose; strongly acid (pH 5.2).
TYPE LOCATION: Tillamook County, Oregon; about 1 mile southwest of town of Nehalem, 2,220 feet south of U.S. Highway 101 and 300 feet east of north-south road 1/2 mile west of Nehalem; SW1/4 SE1/4 of section 28, T. 3 N., R. 10 W. (Latitude 45 degrees, 42 minutes, 41 seconds N. and Longitude 123 degrees, 54 minutes, 43 seconds W.)
RANGE IN CHARACTERISTICS: Unless artificially drained, the soil is continually saturated with water most of the year. The soil is over 60 inches thick, but rooting depth is limited by a water during the winter months below a depth of 24 inches and is saturated to the surface for brief periods during storm periods. The soil is over 60 inches deep to bedrock but rooting depth is limited by the water table. The mean annual soil temperature is 47 to 54 degrees F. The difference between the mean summer and mean winter soil temperature varies from 5 to 9 degrees F. The solum commonly is underlain by many feet of variegated sand, but in some places it is underlain by buried soils formed in finer textured marine sediments or organic or mineral soil material at a depth greater than 40 inches.
The E horizon has value of up through 6 moist, and chroma of 1 or 2. It is loamy fine sand or fine sand. The thickness varies considerably within a horizontal distance of only a few yards.
The Bs horizon has hue of 5Y to 5YR, value of 4 or 5 moist, 5 or 6 dry, and chroma of 2 or 3 moist and dry. Redox features are faint or distinct with hue of 2.5Y and 10YR, value of 4 to 6, and chroma of 2 to 6 moist. Firm or very firm reddish colored weakly cemented nodules and thin very firm lenses are common throughout.
The BC horizon, when present, has color similar to the Bs horizon.
COMPETING SERIES: There are no competing series. The
Blacklock and
Netarts soils are similar. Blacklock soils are poorly drained, contain higher organic matter and have ortstein in the B horizon. Netarts soils are well drained and lack redox features.
GEOGRAPHIC SETTING: Yaquina soils are on terraces and low interdune positions along the Oregon and Washington coastline at elevations ranging from 0 to 130 feet. Slopes are 0 to 5 percent. The soils formed in beach and dune sands that have been nearly leveled by wind and water action. The climate is characterized by cool, wet winters and cool, moist summers with fog. The average annual precipitation is 60 to 120 inches. The average January temperature is 41 degrees F., the average July temperature is 61 degrees F., and the average annual temperature is 45 to 53 degrees F. The frost-free period is 160 to 300 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Depoe,
Gearhart,
Heceta,
Nelscott,
Netarts,
Waldport,
Warrenton and
Westport soils. Depoe soils are fine-loamy and have ortstein. Netarts, Gearhart, Waldport and Westport soils are well or excessively drained on stabilized dunes. Heceta and Warrenton soils are poorly drained, and lack E and Bs horizons. Nelscott soils are moderately well drained, are fine-loamy over sandy or sandy-skeletal, and have a Bsm horizon.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; moderately rapid permeability. An apparent water table is at its uppermost limit during periods from November through April.
USE AND VEGETATION: Cleared areas are used for pasture and homesites. Native vegetation is mostly shore pine, Pacific rhododendron, azalea, spiraea, salal, evergreen huckleberry, and scattered Sitka spruce.
DISTRIBUTION AND EXTENT: Coastal areas of Oregon and Washington; MLRA 4A. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Tillamook County, Oregon, 1961.
REMARKS: This draft reflects a change in classification from sandy, isotic, isomesic Aquentic Haplorthods to sandy, isotic, isomesic Typic Endoaquods based on Soil Taxonomy 8th edition.
Diagnostic horizons and features in this pedon include:
Albic horizon - from 1 to 7 inches (E horizon).
Spodic Horizon - from 7 to 31 inches (Bs1 and Bs2 horizons).
Redox concentrations - from 15 to 31 inches (Bs2 horizon).
ADDITIONAL DATA: Characterization data for 2 pedons (S74 Oreg. 11-17 and S74 Oreg. 11-21) sampled in Coos County Oregon, SCS, Riverside Soil Survey Lab in computer printout form. Characterization data for one pedon (S73 Oreg. 20-3) by Oregon State University - unpublished.
National Cooperative Soil Survey
U.S.A.