LOCATION STOCKDRIVE OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Natrixeralfs
TYPICAL PEDON: Stockdrive fine sandy loam, rangeland. (Colors are for moist soil unless otherwise noted.)
Akn--0 to 3 inches; brown (10YR 4/3) fine sandy loam; light gray (10YR 7/2) dry; moderate thin platy structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine roots; common very fine and fine vesicular pores; violently effervescent; very strongly alkaline (pH 9.6); abrupt smooth boundary. (2 to 4 inches thick)
2Btkn1--3 to 6 inches; dark brown (10YR 4/3) loam; light yellowish brown (10YR 6/4) dry; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common very fine and fine and few medium and coarse roots; few very fine and fine vesicular pores; very few faint yellowish brown (10YR 5/4) continuous clay films (cutans) on faces of peds; violently effervescent; very strongly alkaline (pH 9.6); gradual smooth boundary. (2 to 6 inches thick)
2Btkn2--6 to 12 inches; dark brown (10YR 4/3) silty clay loam; light yellowish brown (10YR 6/4) dry; weak fine and medium prismatic structure; hard, firm, very sticky and very plastic; common very fine and fine and few medium and coarse roots; few very fine and fine tubular pores; very few faint yellowish brown (10YR 5/4) continuous clay films (cutans) on faces of peds; common fine and medium rounded soft masses of carbonate; violently effervescent; very strongly alkaline (pH 9.6); gradual smooth boundary. (5 to 15 inches thick)
2Bkn--12 to 29 inches; dark yellowish brown (10YR 4/4) fine sandy loam; pale brown (10YR 6/3) dry; massive; soft, friable, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine discontinuous tubular pores; few medium and coarse rounded soft masses of carbonate; violently effervescent; very strongly alkaline (pH 9.6); clear smooth boundary. (15 to 20 inches thick)
3Bknz--29 to 32 inches; dark yellowish brown (10YR 4/4) very gravelly sand; pale brown (10YR 6/3) dry; single grained; loose, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine pores; violently effervescent; salt wicking to the surface of pit face; very strongly alkaline (pH 9.6); 40 percent gravel; abrupt wavy boundary. (0 to 5 inches thick)
3Bnz--32 to 34 inches; dark grayish brown (10YR 4/2) extremely gravelly sand; light brownish gray (10YR 6/2) dry; single grained; loose, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine pores; salt wicking to the surface of pit face; very strongly alkaline (pH 9.6); 60 percent gravel; clear wavy boundary. (0 to 3 inches thick)
3Bnqz1--34 to 38 inches; brown (10YR 5/3) very gravelly sand; light brownish gray (10YR 6/2) dry; massive; slightly hard, firm, nonsticky and nonplastic, very weakly cemented by silica; salt wicking to the surface of pit face; very strongly alkaline (pH 9.6); 40 percent gravel; clear smooth boundary. (0 to 5 inches thick)
3Bnqz2--38 to 44 inches; dark brown (10YR 4/3) sand; light brownish gray (10YR 6/2) dry; massive; slightly hard, friable, nonsticky and nonplastic, very weakly cemented by silica; salt wicking to the surface of pit face; very strongly alkaline (pH 9.6); 10 percent gravel; clear smooth boundary. (8 to 15 inches thick)
4Bknz1--44 to 56 inches; dark brown (10YR 3/3) silty clay loam; very pale brown (10YR 7/4) dry; coarse distinct black (10YR 2/1) manganese stains on faces of peds; strong fine and medium angular blocky structure; very hard, firm, slightly sticky and slightly plastic; slightly effervescent; fine carbonates in filaments and threads; very strongly alkaline (pH 9.6); clear smooth boundary. (10 to 15 inches thick)
4Bknz2--56 to 66 inches; dark yellowish brown (10YR 4/6) silty clay loam; very pale brown (10YR 7/3) dry; coarse distinct black (10YR 2/1) manganese stains on faces of peds; strong fine and medium angular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; slightly effervescent; very strongly alkaline (pH 9.6).
TYPE LOCATION: Lake County, Oregon; about 0.75 miles southwest of the Lakeview Airport; about 1800 feet south and 200 feet east of the northwest corner Sec. 31, T. 39 S., R. 20 E.; Latitude: 42 degrees 09 minutes 05 seconds N., Longitude: 120 degrees 24 minutes 50 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 48 to 50 degrees F. The soils are usually moist but are dry for 60 to 90 consecutive days during the four-month period following the summer solstice. The soils are strongly or very strongly alkaline. The particle-size control section has 25 to 35 percent clay. Depth to the stratified sand and gravel layer (3B) is 25 to 45 inches.
The A horizon has hue of 10YR, value 6 or 7 dry, 3 to 5 moist, chroma of 2 or 3 moist and dry. The surface shows white and black alkali colors. SAR is 15 to 40. EC is greater than 8 mmhos/cm.
The 2Bt horizon has hue of 10YR, value of 5 or 6 dry, 3 or 4 moist, chroma of 3 or 4 moist and dry. It is loam or silty clay loam with 25 to 35 percent clay. SAR is 30 to 70. EC is greater than 8 mmhos/cm.
The 3B horizon has hue of 10YR, value of 6 or 7 dry, 3 to 5 moist, chroma of 2 to 4 moist and dry. It is stratified sand and gravel. Gravel content is 0 to 70 percent. SAR is 5 to 15. EC is greater than 16 mmhos/cm.
The 4B horizon has hue of 10YR or 2.5Y, value of 5 to 7 dry and 2 to 4 moist. It is sandy clay loam, clay loam or silty clay loam. EC is greater than 16 mmhos/cm. SAR is 5 to 10.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Stockdrive soils are on low lake terraces at elevations of 4,700 to 4,760 feet. Slopes are 0 to 1 percent. These soils formed in eolian material over lacustrine sediments. The mean annual temperature is 45 to 49 degrees F. The mean annual precipitation is 14 to 18 inches. The frost-free period is 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Thunderegg, Tandy, Goose Lake, and Ozamis series. Thunderegg, Goose Lake, and Ozamis soils are poorly drained and have an aquic moisture regime. Tandy, Goose Lake, and Ozamis soils lack a natric horizon. Thunderegg and Tandy soils occur at a slightly lower elevation on the terrace.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; ponded; perched water table from one half foot above to 1 foot below the surface from March to May, and an apparent lower water table at 2 to 4 feet from March to July. The lower water table is high in dissolved salts. Permeability is slow.
USE AND VEGETATION: Stockdrive soils are used for livestock grazing, native meadow hay, and wildlife habitat. A few areas are used for cropland. Native vegetation is basin wildrye, inland saltgrass, black greasewood, alkali bluegrass, and gray rabbitbrush.
DISTRIBUTION AND EXTENT: Basin areas of Southeastern Oregon, MLRA 21. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Lake County, Oregon, Southern Part, 1991.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - dry and moist colors are too light for mollic colors. Organic matter is 1 to 2 percent.
Natric horizon - 3 to 12 inches. All SAR and EC ranges are estimates based on similar soils with similar vegetation in Chewaucan and Warner Valleys; (2Btkn1 and 2Btkn2 horizons).
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.