LOCATION SCHERRARD               OR

Established Series
Rev. JSC/AON/CEG/BTH
02/2024

SCHERRARD SERIES

Landscape--Intermontane basins
Landform--terraces
Slope--0 to 1 percent
Parent material--mixed sediments weathered from diatomite and tuff
Mean annual precipitation--about 330 mm
Mean annual air temperature--about 7 degrees C
Depth class--moderately deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine, smectitic, mesic Natric Duraquolls

TYPICAL PEDON: Scherrard clay loam, irrigated pasture

Ap --0 to 13 cm; clay loam, gray (10YR 5/1) dry, black (10YR 2/1) moist; weak thin platy parting to moderate very fine angular blocky structure; hard, firm, very sticky and very plastic; many very fine roots; many very fine pores; strongly alkaline (pH 8.6); abrupt wavy boundary

A--13 to 25 cm; silty clay, gray (10YR 5/1) dry, black (10YR 2/1) moist; moderate fine angular blocky structure; hard, firm, very sticky and very plastic; many very fine roots; common very fine tubular pores; strongly effervescent in spots; strongly alkaline (pH 8.6); clear wavy boundary

Btkn--25 to 53 cm; silty clay, gray (10YR 5/1) dry, black (10YR 2/1) moist; gray (10YR 6/1) rubbed and dry; weak medium prismatic parting to moderate fine angular blocky structure; very hard, very firm, very sticky and very plastic; common very fine roots; common very fine tubular pores; many cutans on surfaces of peds; strongly effervescent, common grayish brown (10YR 5/2) lime spots and patches; strongly alkaline (pH 9.0); abrupt smooth boundary

Bkqm1--53 to 69 cm; duripan , light brownish gray (10YR 6/2) and light gray (10YR 7/1) dry, very dark grayish brown (10YR 3/2) moist; platy; very hard, very firm, strongly coherent; grayish brown (10YR 5/2) laminar opaline cap 1 to 2 millimeters thick at top of pan; thin opaline coating on plate surfaces; strongly effervescent; strongly alkaline (pH 8.8); clear wavy boundary

Bkqm2--69 to 84 cm; duripan, light gray (10YR 7/1) dry, dark grayish brown (10YR 4/2) moist; massive; very hard, very firm, brittle, weakly coherent; slightly effervescent; moderately alkaline (pH 8.4); clear wavy boundary

C--84 to 152 cm; sandy loam, light gray (10YR 7/1) dry, dark grayish brown (10YR 4/2) moist; massive; slightly hard, friable, nonsticky and nonplastic; many very fine pores; moderately alkaline (pH 8.2)

TYPE LOCATION: Klamath County, Oregon; about 2.2 km south of the town of Dairy; 563 m east and 488 m south of the northwest corner of of section 27, T. 39 S., R. 11.5 E., Willamette Meridian; Dairy, Oregon USGS 7.5 Minute Topographic Quadrangle; latitude 42.16183 degrees north, longitude 121.5189 degrees west, datum WGS 84 (coordinates derived from topographic map legal description)

RANGE IN CHARACTERISTICS:
Soil temperature regime--mesic
Mean annual soil temperature-- 8 to 11 degrees C
Moisture control section--10 to 30 cm
Depth to duripan--50 to 100 cm, but most commonly 50 to 75 cm
Mollic epipedon--25 to 50 cm thick
Exchangeable sodium--exceeds 15 percent in all or part of the upper 50 cm, decreasing with increasing depth below 50 cm
Calcareous--all parts at depths between 25 and 100 cm
Duripan--commonly has platy structure; opal coatings on plate surfaces and/or a laminar opaline cap 1 to 2 mm thick

Ap and A horizons
Value--4 or 5 dry, 2 or 3 moist
Chroma--0 or 1 dry or moist
Fine-earth texture--clay loam, silty clay loam, silt loam, very fine sandy loam
Clay content--30 to 45 percent
Thickness--8 to 38 cm

Btkn horizon
Hue--neutral, 10YR, or 2.5Y dry or moist
Value--4 to 6 dry, 2 or 3 moist
Chroma--0 to 2 dry or moist
Clay content--35 to 45 percent clay
Stress cutans--on ped surfaces
Reaction--strongly or very strongly alkaline (pH 8.5 or greater)
Calcium carbonate--many segregated lime masses
Thickness--12 to 45 cm

Bkqm horizons (duripan)
Thickness--10 to 60 cm

C horizon
Fine-earth texture--sandy loam, sandy clay loam
Clay content--10 to 25 percent
Reaction--slightly or moderately alkaline (pH 7.4 to 8.4)

COMPETING SERIES:
Whipp--mollic epipedon that includes part of the natric horizon; poorly drained; has an E horizon; mean annual soil temperature of 11 to 12 degrees C

GEOGRAPHIC SETTING:
Elevation--1234 to 1440 m
Climate--cool, wet winters and hot, dry summers
Mean annual air temperature-- 7 to 11 degrees C
Mean annual precipitation--254 to 570 mm
Frost-free period--50 to 110 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Henley--on terraces; ochric epipedon; loam or sandy loam texture in all parts of the profile
Hosley--on low terraces in basins; fine-loamy
Lakeview--on flood plains, alluvial fans, and stream terraces; not sodic; very deep (no duripan)
Malin--on flood plains and lake bottoms; very deep (no duripan present within 150 cm)

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Saturated hydraulic conductivity (Ksat)--low to high
Surface runoff--very slow
Saturation in normal years--episaturation (above the duripan) and endosaturation (below the duripan); water table is highest in March through May

USE AND VEGETATION:
Use--irrigated barley and pasture, native wet meadow hay and pasture, wildlife habitat
Vegetation--Baltic rush, inland saltgrass, meadow barley

DISTRIBUTION AND EXTENT: Klamath and Shasta Valleys and Basins, OR; MLRA 21; moderately extensive

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California

SERIES ESTABLISHED:
Klamath County, Oregon, 1977

REMARKS :
Diagnostic horizons and features in this pedon
*Mollic epipedon--Ap and A horizons
*Natric horizon--Btkn horizon
*Duripan--Bkqm1 and Bkqm2 horizons
*Particle-size control section--Btk horizon

02/1997: This draft reflects a change in classification from a fine, montmorillionitic (calcareous), mesic Natric Duraquolls to a fine, montmorillonitic, mesic Natric Duraquolls.

05/2022: updated formatting and competing series sections; no major content changes

ADDITIONAL DATA:
NASIS SITE ID--1977OR035007; NASIS PEDON ID--1977OR035007

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National Cooperative Soil Survey
U.S.A.