LOCATION NETARTS OR+WAEstablished Series
TAXONOMIC CLASS: Sandy, isotic, isomesic Entic Haplorthods
TYPICAL PEDON: Netarts fine sandy loam, virgin forest, on a 10 percent slope and at an elevation of 230 feet. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 2 inches; slightly decomposed needles, leaves, twigs, roots and moss.
A--2 to 5 inches; black (10YR 2/1) fine sandy loam, very dark brown (10YR 2/2) dry; many gray and light brownish gray clean sand grains; single grain; loose; nonsticky and nonplastic; weakly smeary; many very fine, fine, medium and coarse roots; many very fine interstitial pores; extremely acid (pH 4.4); abrupt irregular boundary. (0 to 4 inches thick)
E--5 to 9 inches; mixed dark grayish brown (2.5Y 4/2), grayish brown (2.5Y 5/2), light brownish gray (2.5Y 6/2), and gray (10YR 6/1) loamy fine sand; grayish brown (2.5Y 5/2), light brownish gray (2.5Y 6/2), light gray (2.5Y 7/2) and light gray (10YR 7/1) dry; single grain; loose; nonsticky and nonplastic; many very fine, fine, medium and coarse roots; many very fine interstitial pores; very strongly acid (pH 4.8); clear wavy boundary. (1 to 5 inches thick)
ABs--9 to 15 inches; mixed grayish brown (2.5Y 5/2), light brownish gray (2.5Y 6/2), and light yellowish brown (2.5Y 6/4) loamy fine sand; light brownish gray (2.5Y 6/2), light gray (2.5Y 7/2), and pale yellow (2.5Y 7/4) dry; common coarse dark brown (7.5YR 3/2) humus stained patches; single grain; loose; nonsticky and nonplastic; common very fine, fine, medium and coarse roots; many very fine interstitial pores; 1 percent medium, dark brown (7.5YR 3/4), very weakly iron-cemented nodules; strongly acid (pH 5.2); clear wavy boundary. (0 to 12 inches thick)
Bs1--15 to 19 inches; variegated dark brown (7.5YR 3/2 and 4/4), light brownish gray (2.5Y 6/2), and light yellowish brown (2.5Y 6/4) fine sand, brown (7.5YR 4/3), strong brown (7.5YR 4/6), light gray (2.5Y 7/2) and pale yellow (2.5Y 7/4) dry; single grain; loose; nonsticky and nonplastic; few fine and medium roots; many very fine interstitial pores; intermittent reddish brown (5YR 4/4) weakly iron-cemented lenses; strongly acid (pH 5.2); clear wavy boundary.
Bs2--19 to 37 inches; variegated reddish brown (5YR 4/4), dark brown (7.5YR 3/2), and grayish brown (2.5Y 5/2) fine sand; light reddish brown (5YR 6/4), brown (7.5YR 5/2), and light brownish gray (2.5Y 6/2) dry; massive; weakly cemented; hard, very firm; few fine and medium roots in the upper part; 5 percent moderately iron-cemented fragments and nodules; strongly acid (pH 5.3); gradual wavy boundary. (combined Bs horizon is 13 to 25 inches thick)
BCs--37 to 54 inches; variegated yellowish brown (10YR 5/4), grayish brown (2.5Y 5/2), and light brownish gray (2.5Y 6/2) fine sand, light yellowish brown (10YR 6/4) and light brownish gray (2.5Y 6/2) dry; massive; soft, very friable; nonsticky and nonplastic; 1 percent weakly iron-cemented fragments and nodules; strongly acid (pH 5.3); gradual wavy boundary. (0 to 20 inches thick)
C--54 to 67 inches; variegated dark grayish brown (2.5Y 4/2), grayish brown (2.5Y 5/2), light yellowish brown (2.5Y 6/4), and pale yellow (2.5Y 7/4) fine sand, grayish brown (2.5Y 5/2), light brownish gray (2.5Y 6/2), pale yellow (2.5Y 7/4) and yellow (2.5Y 7/6) dry; single grain; loose; nonsticky and nonplastic; strongly acid (pH 5.4).
TYPE LOCATION: Tillamook County, Oregon; about 0.8 of a mile northwest of Netarts, Oregon; about 2,350 feet east and 100 feet south of the northwest corner of section 31, T. 1 S., R. 10 W.; USGS Netarts topographic quadrangle; latitude 45 degrees 26 minutes 58 seconds N. and longitude 123 degrees 57 minutes 29 seconds W. NAD 27.
RANGE IN CHARACTERISTICS: The soils are usually moist and are dry less than 45 consecutive days between the depths of 12 and 35 inches during the 4 month period following the summer solstice. The mean annual soil temperature is 50 to 52 degrees F. The difference between mean summer and mean winter soil temperature varies from 5 to 9 degrees F. under canopy cover. Soil color is commonly mixed or variegated below the A horizon.
The A horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist and dry, and chroma or 1 or 2 moist and dry. It is loose or very friable. Texture is fine sandy loam, fine sand or loamy fine sand with 1 to 8 percent clay. The A horizon is absent in some pedons.
The E horizon has hue of 2.5Y or 10YR, value of 4 through 6 moist, 4 through 7 dry, and chroma of 1 or 2 moist and dry. Texture is fine sand or loamy fine sand with 1 to 5 percent clay.
The Abs horizon, when present, has hue of 2.5YR or 10YR, value of 5 or 6 moist, 5 through 7 dry and chroma of 2 through 4 moist and dry. Texture is loamy fine sand or fine sand with 1 to 5 percent clay. It has 0 to 10 percent very weakly to weakly iron-cemented nodules.
The Bs horizon has hue of 2.5Y through 5YR, value of 3 through 6 moist, 4 through 8 dry, and chroma of 2 through 8 moist and dry. The iron-rich material ranges from thin stratified layers to thick massive layers that are very weakly to weakly cemented. It has 0 to 40 percent very weakly through moderately iron-cemented nodules and fragments. Intermittent moderately iron-cemented lenses are in some pedons. The very weakly to weakly cemented iron-rich material is absent in some pedons. Texture is loamy fine sand, sand, or fine sand with 1 to 5 percent clay. It is single grain or massive. The organic matter is estimated to be less than 2 percent in the upper 4 inches of the spodic horizon.
The BC horizon, when present, has hue of 2.5Y or 10YR, value of 3 through 5 moist, 4 through 7 dry and chroma of 3 through 6 moist and dry. Texture is fine sand, loamy fine sand or sand with 1 to 5 percent clay. It has 0 to 30 percent very weakly to moderately iron-cemented nodules and fragments and has intermittent very weakly to weakly iron-cemented lenses.
The C horizon, when present, has hue of 2.5Y or 10YR, value of 5 or 6 moist, 6 or 7 dry and chroma of 2 through 4 moist and dry. Texture is fine sand or sand with 1 to 5 percent clay. It has 0 to 10 percent very weakly to weakly iron-cemented nodules. In some pedons it has intermittent thin very weakly to weakly iron-cemented lenses.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Netarts soils are on stabilized sand dunes that have undulating to hilly topography and are at elevations of 20 to 300 feet. Slopes range from 0 to 60 percent. The soils formed in slightly weathered dune sand. The climate is characterized by cool wet winters and cool moist summers with low clouds and fog. The mean annual precipitation is 60 to 100 inches. The mean annual temperature is 49 to 52 degrees F. The frost-free period is 180 to 300 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gearhart, Heceta, Nelscott, Yaquina, Warrenton, and Walport soils. Gearhart soils have a very dark brown umbric epipedon and are on slightly younger dunes. Heceta soils are poorly drained, lack a B horizon and are on recent interdune swales and low areas. Nelscott soils have an umbric epipedon, are moderately fine textured and are on adjacent marine terraces. Warrenton soils are poorly drained, have an umbric epipedon and are on slightly younger interdune swales and low areas. Waldport soils are on recently stabilized sand dunes and lack a B horizon. Yaquina soils are somewhat poorly drained and are on interdune swales and low areas.
DRAINAGE AND PERMEABILITY: Well drained; moderately rapid permeability.
USE AND VEGETATION: Most of these soils are forested but limited use is made for forestry. Other uses include building sites, recreation and wildlife habitat. Native vegetation is mainly shore pine, Sitka spruce, western hemlock, evergreen huckleberry, salal, western swordfern, salmonberry, Pacific rhododendron, manzanita, and scattered Douglas fir.
DISTRIBUTION AND EXTENT: Along fog influenced coastal plains and beach areas of Oregon and Washington; MLRA 4A. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Tillamook County, Oregon, 1961. The source of the name is Netarts, Oregon located along the Pacific Ocean about 5 miles west of Tillamook, Oregon.
REMARKS: Diagnostic horizons and features of this pedon include:
Ochric epipedon - from 2 to 9 inches (A, E horizons).
Albic horizon - from 5 to 9 inches (E horizon).
Spodic horizon - from 9 to 54 inches (ABs, Bs1, Bs2, and BCs horizons).
Depths to diagnostic horizons and features in this pedon are measured from the top of the first mineral layer.
Classification revised 3/98 from mixed mineralogy to isotic based on the 7th edition of Keys to Soil Taxonomy.
More investigation is needed to determine if this series concept may qualify for a fragic subgroup.
ADDITIONAL DATA: Characterization data on 2 pedons (S74 Oreg. 11-22 and 11-5) samples in Coos County, Oregon and reported on SCS Lincoln Soil Survey Lab.
computer printout for soils sampled for the Coos County project.