LOCATION STIRFRY OREstablished Series
TAXONOMIC CLASS: Euic Typic Cryosaprists
TYPICAL PEDON: Stirfry supporting the lodgepole pine/bog blueberry/widefruit sedge plant association on a 12 percent slope at 5216 feet elevation. When described on 16 September 1998 the soil was moist to 14 inches and wet from 14 to 82 inches (Colors are for dry soil unless otherwise noted).
Oi--0 to 14 inches; pale yellow (5Y 7/4) peat, pale yellow (5Y 7/4) moist and fresh, dries to a very pale brown (10YR 7/4); fiberous;100 percent non-rubbed sphagnum fiber, 95 percent rubbed fiber; very strongly acid (pH 4.8); abrupt broken boundary. (0 to 20 inches thick)
Oe--14 to 19 inches; dark reddish brown (5YR 3/2) mucky peat, dark brown (7.5YR 3/2) moist; fiberous; soft, very friable, nonsticky and nonplastic; many very fine and fine roots, common medium and coarse roots; 90 percent non-rubbed fiber of mossy, herbaceous and woody materials, 40 percent rubbed fiber; common distinct black (10YR 2/1) streaks and stains of diatomaceous earth when freshly exposed and moist, prominent white (10YR 8/1) when dry; strongly acid (pH 4.8); abrupt smooth boundary. (4 to 20 inches thick)
Oa1--19 to 32 inches; black (7.5YR 2.5/1) muck, black (5YR 2.5/1) moist; fiberous; slightly hard, very friable, nonsticky and nonplastic; many very fine roots, common fine and few coarse roots; 80 percent non-rubbed fiber of mossy and herbaceous materials, 10 percent rubbed fiber; trace coarse woody materials; 15 percent black (2.5Y 2.5/1) sand or gravel-size charcoal fragments, black (2.5Y 2.5/1) moist; few thin prominent variegated lens of ashy medium sand, dry or moist; moderately acid (pH 5.8); gradual smooth boundary
Oa2--32 to 72 inches; black (7.5YR 2.5/1) muck, black (5YR 2.5/1) moist; fiberous; slightly hard, very friable, nonsticky and nonplastic; many very fine roots; 80 percent non-rubbed fiber of mossy, herbaceous and woody materials, 10 percent rubbed fiber; many coarse prominent dark brown (7.5YR 3/4) hypocoats surrounding coarse woody material, distinct dark reddish brown (5YR 3/2) moist; 15 percent dark brown (5YR 3/3) to brown (7.5YR 4/4) coarse woody material, dry or moist; trace black (2.5Y 2.5/1) sand-size charcoal fragments, black (2.5Y 2.5/1) moist; moderately acid (pH 5.6); clear smooth boundary.
Oa3--72 to 78 inches; black (7.5YR 2.5/1) muck, black (5YR 2.5/1) moist; weak coarse subangular blocky structure; hard, very friable, nonsticky and nonplastic; few very fine roots; few fine tubular pores; 40 percent non-rubbed fiber of mossy, herbaceous and woody materials, 5 percent rubbed fiber; 10 percent dark brown (5YR 3/3) to brown (7.5YR 4/4) coarse woody material, dry or moist; strongly acid (pH 5.2); abrupt smooth boundary.
Oa4--78 to 81 inches; very dark gray (7.5YR 3/1) muck, black (10YR 2/1) moist; weak coarse subangular blocky structure; hard, very friable, nonsticky and nonplastic; 10 percent non-rubbed fiber, trace rubbed fiber; 15 percent black (2.5Y 2.5/1) sand or gravel-size charcoal fragments, black (2.5Y 2.5/1) moist; 5 percent white (10YR 8/1) ashy coarse sand and ashy very coarse sand fragments in matrix, pale yellow (2.5Y 7/2) moist; 5 percent white (10YR 8/1) paragravel in matrix, pale yellow (2.5Y 7/2) moist; common coarse prominent gray (10YR 5/1) lens of ashy coarse sandy loam, very dark gray (10YR 3/1) moist; strongly acid pH 5.4); abrupt smooth boundary. (combined thickness of Oa horizons is 30 to greater than 60 inches thick)
2A--81 to 82 inches; gray (10YR 5/1) paragravelly ashy coarse sandy loam, very dark gray (10YR 3/1) moist; very friable, nonsticky and nonplastic; 20 percent paragravel; moderately acid (pH 5.6).
TYPE LOCATION: Klamath County, Oregon; about 9 miles east of Chemult; about 400 feet north and 110 feet west of the southeast corner of section 23, T. 27 S., R. 9 E. (Latitude 43 degrees, 12 minutes, 42 seconds North, Longitude 121 degrees, 36 minutes, 23 seconds West)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 35 to 40 degrees F.
Mean summer soil temperature - 40 to 43 degrees F.
Mean winter soil temperature - 32 to 35 degrees F.
Depth to aquic conditions - 0 to 20 inches
Oi horizon
Thickness: 0 to 20 inches
Non-rubbed fiber content: 95 to 100 percent
Rubbed fiber content: 75 to 95 percent
Reaction: very strongly acid to moderately acid (pH 4.5 to 6.0)
Other: The horizon occurs as micro-highs or hummocks and is absent on micro-lows or depressions.
Oe horizon
Depth to: 0 to 20 inches
Thickness: 4 to 20 inches
Hue, non-rubbed: 5YR, 7.5YR or 10YR dry or moist
Value, non-rubbed: 2, 2.5, 3 or 4 dry; 2, 2.5 or 3 moist
Chroma, non-rubbed: 1 or 2 dry; 1, 2 or 3 moist
Non-rubbed fiber content: 60 to 90 percent
Rubbed fiber content: 20 to 50 percent
Reaction: very strongly acid to moderately acid (pH 4.5 to 6.0)
Oa horizons
Depth to: 4 to 24 inches
Thickness: 30 to greater than 60 inches
Hue, non-rubbed: 5YR, 7.5YR or 10YR dry or moist
Value, non-rubbed: 2, 2.5, 3 or 4 dry; 2, 2.5 or 3 moist
Chroma, non-rubbed: 1 or 2 dry; 1, 2 or 3 moist
Non-rubbed fiber content: 20 to 50 percent
Rubbed fiber content: less than 15 percent
Reaction: very strongly acid to moderately acid (pH 4.5 to 6.0)
2A horizon
Depth to: 51 to greater than 60 inches
Hue: 10YR or 2.5Y dry or moist
Value: 4 or 5 dry, 3 moist
Chroma: 1 dry or moist
Texture: ashy coarse sandy loam or ashy loamy coarse sand
Paragravel content: 5 to 35 percent
Volcanic glass content: 60 to 100 percent in the 0.02 to 2.0 mm fraction
Ammonium oxalate extractable Al plus 1/2 Fe: less than 0.4 percent
Phosphate retention: less than 25 percent
Reaction: strongly acid or moderately acid (pH 5.1 to 6.0)
COMPETING SERIES: These are the Karheen and Yamsay series. Karheen soils have very gravelly and extremely gravelly textures below a depth of about 10 inches. Yamsay soils contain layers of diatomaceous or coprogenous earth within the control section.
GEOGRAPHIC SETTING:
Landscape - lava plateau
Landform - drainageways
Elevation - 4,100 to 6,500 feet
Slope- 0 to 15 percent
Parent material - mossy organic material over volcanic ash and pumice from Mt. Mazama
Mean annual air temperature - 38 to 43 degrees F
Mean January air temperature - 25 to 27 degrees F
Mean July air temperature - 57 to 60 degrees F
Mean annual precipitation - 25 to 70 inches
Frost-free period - 0 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lapine, Cosbie, Mariel and Mesquito soils. Lapine soils are on adjacent plateaus. They formed in volcanic ash and pumice, are excessively drained and have a xeric moisture regime. Cosbie soils occur interspersed with Stirfry soils. They have layers of limnic soil material, diatomaceous earth with n Values greater than 0.7 and lack histic epipedons. Mesquito soils are in nearby flood plains. They have layers with greater than 60 percent basalt cobbles, stones or boulders beginning at a depth of 10 to 20 inches. Mariel soils are dominated by hemic organic soil material.
DRAINAGE AND PERMEABILITY:
Drainage - very poorly drained
Permeability - moderately rapid
Flooding - none
Ponding - none
Water table - an apparent water table is at its uppermost limit from January to December
USE AND VEGETATION: Stirfry soils are used for wildlife habitat, watershed and recreation. The potential natural plant community is the lodgepole pine/bog blueberry/widefruit sedge plant association (CLM3-12). The hummocks or micro-highs, have a folistic epipedon, are considered part of the potential natural plant community. The bog blueberry/fewflower spikerush plant association (SW41-12) is a seral community. This seral community is supported in positions where hummocks or micro-highs are widely dispersed or absent.
DISTRIBUTION AND EXTENT: Klamath County, Oregon; MLRA 6 and 3. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Crater Lake National Park, Oregon, 2001.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Folistic epipedon - from 0 to 14 inches (the Oi horizon)
Fibric soil material - from 0 to 14 inches (the Oi horizon)
Hemic soil material - from 14 to 19 inches (the Oe horizon)
Sapric soil material - from 19 to 81 inches (the Oa1, Oa2, Oa3 and Oa4 horizons)
Sapric soil material in subsurface tier average 72 percent (17 cumulative inches within the 12 to 36 inches depth zone; portion of the O1, Oe, Oa1 and portion of the Oa2 horizons)
Histosol control section - from 0 to 51 inches (the Oi, Oe, Oa1 and portion of Oa2 horizons)
Very strongly acid to moderately acid reaction throughout the Histosol control section
Aquic conditions - endosaturation on 16 September 1998 from 14 to 82 inches (the Oe, Oa1, Oa2, Oa3, Oa4 and 2A horizons)
Moisture regime - aquic
Temperature regime - cryic