LOCATION KLOOTCHIE OREstablished Series
TAXONOMIC CLASS: Medial, ferrihydritic, isomesic Typic Fulvudands
TYPICAL PEDON: Klootchie silt medial loam, wooded. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 2 inches; partially decomposed leaves, twigs, moss and woody materials.
A1--2 to 5 inches; dark reddish brown (5YR 3/2) medial silt loam, reddish brown (5YR 4/3) dry; moderate medium and fine granular structure; slightly hard, friable, slightly sticky, slightly plastic, and weakly smeary; many medium, fine and very fine roots; many very fine and fine irregular pores; about 5 percent gravel; very strongly acid (pH 4.6); gradual smooth boundary.
A2--5 to 14 inches; dark reddish brown (5YR 3/3) medial silt loam, reddish brown (5YR 5/3) dry; moderate medium granular structure; slightly hard, friable, slightly sticky, slightly plastic, and weakly smeary; many medium fine and very fine roots; many fine and very fine irregular pores; about 10 percent gravel; very strongly acid (pH 4.8); clear wavy boundary. (combined A horizon is 12 to 20 inches thick)
Bw--14 to 27 inches; reddish brown (5YR 4/4) medial silt loam, reddish brown (5YR 5/4) dry; moderate medium subangular blocky structure parting to moderate fine subangular blocky; slightly hard, friable, slightly sticky, slightly plastic and weakly smeary; common fine roots; common fine and very fine tubular pores; about 10 percent gravel; very strongly acid (pH 4.8); clear wavy boundary. (10 to 40 inches thick)
BC--27 to 45 inches; reddish brown (5YR 4/4) gravelly medial silt loam, reddish brown (5YR 5/4) dry; weak medium subangular blocky structure; slightly hard, friabe, slightly sticky, slightly plastic and weakly smeary; few very fine roots; few very fine tubular pores; about 30 percent gravel; very strongly acid (pH 4.6); clear wavy boundary. (0 to 20 inches thick)
Cr--45 inches; fractured partially weathered basalt breccia.
TYPE LOCATION: Clatsop County, Oregon; north of Lewis and Clark Road above Horseworld; southwest 1/4 southwest 1/4 sec. 11, T. 6 N., R. 10 W., Willamette Meridian.
RANGE IN CHARACTERISTICS: The soil is usually moist and is dry for less than 45 consecutive days between the depths of 4 to 12 inches after the summer solstice. The mean annual soil temperature is 47 to 52 degrees F. The difference between the mean summer and the mean winter soil temperature is 5 to 9 degrees F. The umbric epipedon is 12 to 20 inches. Depth to a paralithic contact is 40 to 60 inches or more. It is extremely to strongly acid throughout. The particle-size control section has a moist bulk density of 0.70 to 0.90 g/cubic centimeters acid-oxalate extractable aluminum plus one-half iron of 2 to 4 percent, and phosphate retention of 90 to 100 percent.
The A horizon has hue of 5YR, 7.5YR, or 10YR, value of 2 or 3 moist, 4 or 5 dry, and chroma of 2 or 3 moist and dry. It is medial silt loam with 15 to 22 percent clay by field estimate and 0 to 15 percent gravel and 0 to 25 percent pararock fragments. Organic matter is 10 to 15 percent.
The Bw horizon has hue of 5YR, 7.5YR, or 10YR, value of 3 or 4 moist, 4, 5, or 6 dry, and chroma of 4, 5, or 6 moist and dry. It is medial silt loam, medial loam, medial clay loam or medial silty clay loam with 20 to 35 percent clay by field estimate. It has 0 to 25 percent gravel, 0 to 10 percent cobbles, and 0 to 40 percent pararock fragments.
The BC horizon, when present, has hue of 5YR or 7.5YR, value of 4 or 5 moist, 5 or 6 dry, and chroma of 4, 5, or 6 moist and dry. It is medial loam, medial silt loam, or medial silty clay loam with 20 to 30 percent clay by field estimate. It has 15 to 35 percent basalt gravel and 0 to 40 percent pararock fragments.
COMPETING SERIES: These are the Calawah, Ilwaco, Knappton, Lint, Lytell, Mopang, Narel, Neotsu, Neskowin, Newskah, Palix, Papac, Queets and Salander series. Calawah soils are greater than 40 inches to 2B horizons formed from glacial outwash. Ilwaco soils are very deep and have up to 15 percent sandstone paragravel. Knappton soils are 40 or more inches to a lithic bedrock contact. Lebam soils are very deep and have 35 to 55 percent clay in the Bw (cambic) horizon. Lint soils lack rock fragments within the upper 40 inches and are formed in alluvium. Lytell soils have 35 to 60 percent siltstone or sandstone paragravel in the Bw (cambic) horizon. Mopang, Ozette, and Papac soils are deep to a Cd horizon. Narel soils are deep to a paralithic feldsparic sandstone bedrock contact and have 30 to 75 percent sandstone paragravel in the Bw (cambic) horizon. Neotsu and Neskowin soils are 20 to 40 inches to bedrock. Newskah soils are very deep and have 15 to 20 percent clay in the Bw (cambic) horizon. Palix soils are deep to a paralithic sandstone bedrock contact and have 20 to 80 percent siltstone paragravel in the Bw (cambic) horizon. Salander soils have an umbric epipedon greater than 20 inches thick. Queets soils lack an umbric epipedon and are derived from recent alluvium on flood plains.
GEOGRAPHIC SETTING: Klootchie soils are on mountain ridgetops and side slopes. Elevations are 50 to 1800 feet. Slopes range from 3 to 90 percent. The soils formed in colluvium and residuum from volcanic rock. The climate is characterized by cool wet winters and cool moist summers. The average annual precipitation is 70 to 130 inches. The average annual temperature is 44 to 52 degrees F. The frost-free period is 100 to 210 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ecola, Necanicum, Skipanon and Templeton soils. The Ecola and Templeton soils are in the fine-silty family. The Necanicum soils are medial-skeletal. The Skipanon soils are in the fine-loamy family. These soils are on ridgetops and side slopes of mountains.
DRAINAGE AND PERMEABILITY: Well drained; moderate to rapid runoff; and moderate permeability.
USE AND VEGETATION: These soils are used for timber production, recreation, wildlife habitat and homesites. Native vegetation is western hemlock, Sitka spruce, red alder, Douglas fir, western redcedar, western swordfern, brackenfern, cascade Oregongrape, evergreen huckleberry, red huckleberry, salal, salmonberry, and oxalis.
DISTRIBUTION AND EXTENT: Coast Range of Oregon. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clatsop County, Oregon, 1984.
REMARKS: Diagnostic features and horizons in this pedon include:
Umbric epipedon - from 2 to 14 inches (A1 and A2 horizon).
Cambic horizon - from 14 to 27 inches (Bw horizon)
Andic soil properties - from 2 to 45 inches (A1, A2, Bw, and BC horizons).
Depths to diagnostic horizons and features are measured from the top of the first mineral layer.
More investigation is needed on this soil in regards to the silty clay loam and clay loam textures in the Bw horizon and whether andic properties are met based on a bulk density above or below 0.90 g/cc.
ADDITIONAL DATA: Lincoln Laboratory Reference Samples 82T7108, 82T7109, and S81OR007.