LOCATION NUTMEG ORTentative Series
TAXONOMIC CLASS: Medial, amorphic Aquic Haplocryands
TYPICAL PEDON: Nutmeg medial loam - Engelmann spruce/bride's bonnet plant association, woodland, on a 1 percent slope at 5980 feet elevation. (Colors are for moist soil unless otherwise stated.)
Oi--0 to 1 inch; slightly decomposed plant material; forest litter of needles, twigs, cones and leaves; abrupt smooth boundary. (0 to 2 inches thick)
Oe--1 to 1.5 inches; moderately decomposed plant material; forest litter of needles, twigs, cones and leaves; abrupt smooth boundary. (0 to 2 inches thick)
Oa--1.5 to 2 inches; highly decomposed plant material; common fine, many medium and common very fine roots; forest litter of needles, twigs, cones and leaves; abrupt smooth boundary. (0 to 2 inches thick)
A--2 to 12 inches; dark brown (7.5YR 3/3) medial loam, brown (7.5YR 4/4) dry; moderate coarse subangular blocky structure parting to strong very fine granular; slightly hard, very friable, slightly sticky, moderately plastic; common very fine and few fine, medium and coarse roots; common very fine and few fine irregular pores; 5 percent indurated volcanic rock gravel and 1 percent indurated volcanic rock cobbles; moderately acid (pH 5.6); gradual wavy boundary. (10 to 24 inches thick)
Bw1--12 to 37 inches; dark brown (7.5YR 3/4) gravelly medial silt loam, dark yellowish brown (10YR 4/4) dry; moderate very coarse subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; few very fine, fine, and medium roots; many very fine and few fine tubular pores; 15 percent indurated volcanic rock gravel and 3 percent indurated volcanic rock cobbles; moderately acid (pH 6.0); clear wavy boundary. (11 to 30 inches thick)
Bw2--37 to 57 inches; brown (7.5YR 4/4) very gravelly medial loam, light yellowish brown (10YR 6/4) dry; massive; slightly hard, friable, slightly sticky, slightly plastic; many very fine tubular pores; 15 percent coarse strong brown (7.5YR 5/6) iron-manganese masses throughout, brownish yellow (10YR 6/8) dry; 40 percent indurated volcanic rock gravel and 5 percent indurated volcanic rock cobbles; moderately acid (pH 6.0); abrupt smooth boundary. (8 to 28 inches)
2BC--57 to 63 inches; very dark grayish brown (10YR 3/2) very gravelly ashy loamy coarse sand, brown (10YR 5/3) dry; massive; slightly hard, very friable, nonsticky, nonplastic; many very fine irregular pores; 40 percent indurated volcanic rock gravel and 5 percent indurated volcanic rock cobbles; moderately acid (pH 6.0).
TYPE LOCATION: Klamath County, Oregon; about 1 mile south and 16 miles west of Chiloquin; 100 feet west and 50 feet north of the southeast corner of section 36, T. 34 S, R. 5 E., Pelican Butte, Oregon USGS quadrangle. UTM: 0568224 meters E; 4712267 meters N; Zone 10 N. NAD27 CONUS datum. Latitude: 42 degrees 33 minutes 42.00 seconds north, Longitude: 121 degrees 10 minutes 8.00 seconds west.
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean annual soil temperature - 35 to 39 degrees F
Mean summer soil temperature - 38 to 42 degrees F
Mean winter soil temperature - 32 to 36 degrees F
Soil Moisture: udic regime; moisture control section - 8 to 24 inches, saturated in all parts for 15 to 30 days in May or June, moist in all parts when not saturated
Particle-size control section: from the mineral soil surface to 40 inches below the mineral soil surface
andic soil properties throughout the A and Bw horizons:
ammonium oxalate extractable Al plus 1/2 Fe: 3 to 5 percent
phosphate retention: 85 to 100 percent
moist bulk density: 0.50 to 0.85 gm/cc
coarse silt and sand content: 30 to 70 percent in fine earth fraction
volcanic glass content: 5 to 30 percent
water content (air-dry) at 1500 kPa tension: 15 to 18 percent
Upper part (medial): 21 to 39 inches thick
bulk density at 33 kPa water retention: 0.50 to 0.85 gm/cc
rock fragment content, average: 10 to 25 percent
Lower part (medial-skeletal): 1 to 19 inches thick
bulk density at 33 kPa water retention: 0.60 to 0.85 gm/cc
rock fragment content, average: 35 to 60 percent
Diagnostic horizons and features
Umbric epipedon: 10 to 24 inches thick
Cambic horizon: 16 to 40 inches thick
Depth to aquic conditions - 21 to 39 inches
Depth to common or many iron-manganese concentrations - 21 to 39 inches
A horizon
Hue: 7.5YR or 10YR moist or dry
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 to 4 moist or dry
Clay content: 18 to 27 percent
Rock fragment content: 0 to 15 percent
Gravel Content: 0 to 15 percent
Cobble Content: 0 to 10 percent
Stone Content: 0 to 1 percent
Boulder Content: 0 to 1 percent
Organic matter content: 2 to 10 percent
Reaction: strongly acid to slightly acid (pH 5.2 to 6.4)
Base saturation (ammonium acetate): 10 to 40 percent
Bw1 horizon
Depth to: 10 to 24 inches
Hue: 7.5YR or 10YR moist or dry
Value: 3 or 4 moist, 4 or 6 dry
Chroma: 3 or 4 moist or dry
Texture: gravelly medial loam, gravelly medial silt loam
Clay content: 18 to 27 percent
Rock fragment content: 15 to 35 percent
Gravel Content: 10 to 30 percent
Cobble Content: 0 to 5 percent
Stone Content: 0 to 1 percent
Boulder Content: 0 to 1 percent
Organic matter content: 0.5 to 2 percent
Reaction: moderately acid or slightly acid (pH 5.6 to 6.1)
Bw2 horizon
Depth to: 21 to 39 in
Hue: 7.5YR or 10YR moist or dry
Value: 3 to 5 moist, 5 or 6 dry
Chroma: 2 to 4 moist, 4 or 6 dry
Texture: very gravelly medial sandy loam, very cobbly medial sandy loam, very gravelly medial loam, very cobbly medial loam
Clay content: 15 to 25 percent
Rock fragment content: 35 to 60 percent
Gravel Content: 10 to 40 percent
Cobble Content: 5 to 25 percent
Stone Content: 0 to 5 percent
Boulder Content: 0 to 1 percent
Reaction: moderately acid to neutral (pH 6.1 to 7.3)
2BC horizon
Depth to: 40 to 63 in
Hue: 7.5YR or 10YR moist or dry
Value: 3 or 4 moist, 5 or 6 dry
Chroma: 2 or 3 moist or dry
Texture: very gravelly ashy loamy coarse sand, very cobbly ashy loamy coarse sand, very gravelly ashy coarse sandy loam, very cobbly ashy coarse sandy loam
Clay content: 2 to 8 percent
Rock fragment content: 40 to 60 percent
Gravel content: 20 to 40 percent
Cobble content: 5 to 25 percent
Stone content: 0 to 5 percent
Boulder content: 0 to 5 percent
Volcanic glass content: 5 to 30 percent
Ammonium oxalate extractable Al plus 1/2 Fe: 0.2 to 0.4 percent
Phosphate retention: 10 to 25 percent
Reaction: moderately acid to neutral (pH 6.1 to 7.3)
COMPETING SERIES:
Getchell (WA) - are 20 to 40 inches deep to cemented glacial till
GEOGRAPHIC SETTING:
Landscape - mountains, plateaus and valleys
Landform - drainageways and stream terraces
Elevation - 4150 to 6020 feet
Slope - 0 to 12 percent
Parent material - alluvium derived from volcanic rock or tephra
Climate - cold wet winters, cool dry summers
Mean annual air temperature - 39 to 45 degrees F
Mean annual precipitation - 22 to 68 inches
Frost-free period - 5 to 35 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Anniecreek,
Oatman,
Pokegema and
Woodcock soils.
Anniecreek soils are somewhat poorly drained, have an irregular decrease in organic carbon with depth and lack andic soil properties.
Oatman soils are well drained and have greater than 35 percent rock fragments in the thickest portion of the particle-size control section.
Pokegema soils are well drained and lack redoximorphic concentrations.
Woodcock soils are well drained and have an argillic horizon.
DRAINAGE AND PERMEABILITY:
Drainage - moderately well
Permeability - moderately rapid
Watertable - a seasonal water table is at its uppermost limit in May or June, and present May to August
USE AND VEGETATION: Nutmeg soils are used for wildlife habitat, watershed and recreation. The potential natural plant community is the Engelmann spruce/bride's bonnet plant association. Common overstory species include Engelmann spruce, lodgepole pine, white fir, black cottonwood or quaking aspen. Common understory species include bride's bonnet, common snowberry, gray alder, Saskatoon serviceberry or rose spirea.
DISTRIBUTION AND EXTENT: Klamath County, Oregon; MLRA 3. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Winema National Forest, Klamath County, Oregon, 2008
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon: 2 to 12 inches (A horizon)
Andic soil properties: 2 to 57 inches (A, Bw1 and Bw2 horizons); meets criteria 1, 2, and 3
Cambic horizon: 12 to 57 inches (Bw1 and Bw2 horizons)
Aquic conditions with endosaturation: 37 to 57 inches (Bw2 and 2BC horizons)
Particle-size control section - 2 to 42 inches (A, Bw1 and Bw2 horizons); 2 to 37 inches is medial, 37 to 42 inches is medial-skeletal
ADDITIONAL DATA:
NASIS SITE ID - 04-JFD-13; NASIS PEDON ID - 04OR683013