LOCATION SPRINGCOVE IDEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Typic Natrixeralfs
TYPICAL PEDON: Springcove silt loam - on a south-facing slope of 1 percent in native rangeland. When described on August 30, 1988, the soil was dry to 8 inches and moist below that depth. (Colors are for dry soils unless otherwise noted.)
Anz1--0 to 1 inch; light brownish gray (10YR 6/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate fine, medium and coarse platy structure; slightly hard, very friable, slightly sticky and slightly plastic; common fine and few very fine roots; common very fine and few fine irregular and few tubular pores; slightly effervescent (about 5 percent calcium carbonate equivalent); electrical conductivity is 16.1 mmhos/cm; very strongly alkaline (pH 10.6); abrupt smooth boundary. (0 to 3 inches thick)
Anz2--1 to 5 inches; light brownish gray (10YR 6/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium platy structure; hard, friable, slightly sticky and slightly plastic; common fine and medium and few very fine roots; many very fine and few fine irregular, and few very fine tubular pores; slightly effervescent (about 5 percent calcium carbonate equivalent); electrical conductivity is 37.7 mmhos/cm; very strongly alkaline (pH 9.5); abrupt smooth boundary. ( 2 to 6 inches thick)
Btnz2--5 to 11 inches; gray (10YR 5/1) silty clay, black (10YR 2/1) moist; moderate very fine, fine and medium subangular blocky structure; hard, friable, sticky and plastic; common very fine, fine and medium and few coarse roots; common fine and very fine irregular and few very fine tubular pores; few faint clay films on faces of peds and lining pores; slightly effervescent (about 5 percent calcium carbonate equivalent); electrical conductivity is 12.9 mmhos/cm; very strongly alkaline (pH 9.5); clear smooth boundary. (3 to 10 inches thick)
Btnz2--11 to 22 inches; gray (10YR 5/1) silty clay, very dark grayish brown (10YR 3/2) moist; strong very fine, fine and medium subangular blocky structure; hard, firm, sticky and plastic; common fine and very fine, and few medium roots; common very fine and fine tubular and common very fine irregular pores; few faint clay films on faces of peds and lining pores; slight effervescence (about 5 percent calcium carbonate equivalent); about 5 percent salt crystals; electrical conductivity is 4 mmhos/cm; very strongly alkaline (pH 10.5); clear wavy boundary. (6 to 14 inches thick)
Btnz3--22 to 32 inches; grayish brown (10YR 5/2) silty clay, very dark grayish brown (10YR 3/2) moist; strong very fine, fine and medium prismatic structure; very hard, firm, sticky and plastic; common fine and very fine, and few medium roots; common very fine and few fine tubular pores; few faint clay films on faces of peds and lining pores; slight effervescence (about 5 percent calcium carbonate equivalent); about 5 percent salt crystals; electrical conductivity is 5.8 mmohs/cm; very strongly alkaline (pH 10.2); gradual smooth boundary. (6 to 14 inches thick)
Bn1--32 to 38 inches; light brownish gray (10YR 6/2) silty clay loam, dark grayish brown (10YR 4/2) moist; thin lens of coarse sand (less than 1 inch thick); moderate fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and few fine and medium tubular pores; slight effervescence (about 5 percent calcium carbonate equivalent); electrical conductivity is 3.2 mmohs/cm; very strongly alkaline (pH 9.6); clear wavy boundary. (7 to 20 inches thick)
Bn2--38 to 45 inches; light brownish gray (10YR 6/2) silty clay loam, dark grayish brown (10YR 4/2) moist; moderate fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and few fine roots; common very fine and few fine and medium tubular pores; slight effervescence (about 5 percent calcium carbonate equivalent); electrical conductivity is 2.6 mmohs/cm; very strongly alkaline (pH 9.4); clear wavy boundary. (7 to 20 inches thick)
Bn3--45 to 60 inches; light brownish gray (10YR 6/2) silt loam, dark brown (10YR 3/3) moist; moderate very fine, fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine and few fine and medium tubular pores; few manganese stains; slight effervescence (about 5 percent calcium carbonate equivalent); electrical conductivity is 3.1 mmohs/cm; very strongly alkaline (pH 9.3).
TYPE LOCATION: Gooding County, Idaho; along Clover Creek; 1,280 feet west and 800 feet north of southeast corner of section 3, T. 5 S., R. 12 E.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 50 to 53 degrees F.
Depth to bedrock - more than 60 inches
Reaction - strongly alkaline to very strongly alkaline
Anz horizons
Value - 6 or 7 dry, 2 through 4 moist
Chroma - 1 or 2 dry or moist
Electrical conductivity - 16 to 38 mmhos/cm
Calcium carbonate equivalent - 0 to 5 percent
Sodium absorption ratio - 210 to 300
Btnz horizons
Value - 4 or 5 dry, 2 through 4 moist
Chroma - 1 or 2 dry or moist
Texture - SICL, SIC
Clay content - 35 to 50 percent
Rock fragments - 0 to 5 percent
Electrical conductivity - 5.0 to 13 mmhos/cm
Calcium carbonate equivalent - 0 to 5 percent
Sodium absorption ratio - 160 to 200
Bn horizons
Value - 5 through 7 dry, 2 or 4 moist
Chroma - 2 through 4 dry or moist
Texture - L, SIL, FSL, SICL
Rock fragments - 0 to 5 percent
Electrical conductivity - 2 to 4 mmohs/cm
Sodium absorption ratio - 160 to 200
COMPETING SERIES: This is the Longbilly (T) series. Longbilly soils have E horizons, have average annual soil temperature of 47 to 50 degrees F., and have SAR of 15 to 45 in the natric horizon.
GEOGRAPHIC SETTING: Springcove soils are on stream terraces. These soils formed in alluvium. Slopes are 0 to 2 percent. Elevation is 2,900 to 3,400 feet. The average annual precipitation is 8 to 11 inches. The average annual air temperature is 46 to 51 degrees F. and the frost free period is 100 to 140 days.
DRAINAGE AND PERMEABILITY: Moderately well drained; runoff is very slow; permeability is slow.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Jansite (T), Loupence (T), Power, Purdam, and Quencheroo (T) soils. Jansite soils have mollic epipedons. Loupence, Power, Purdam, and Quencheroo soils do not have natric horizons. Jansite, Loupence, and Quencheroo soils occur on the same landscape. Power and Purdam soils occur on basalt plains.
USE AND VEGETATION: Springcove soils are used for irrigated cropland, pasture, hayland, and limited amount of rangeland. Native vegetation consists of greasewood and saltgrass.
DISTRIBUTION AND EXTENT: Springcove soils are of small extent in southcentral Idaho.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Gooding County, Idaho, 1993.
REMARKS: Diagnostic horizons and features recognized in the pedon are:
Ochric epipedon - the zone from the soil surface to 5 inches (Anz1 and Anz2 horizons)
Natric horizon - 5 to 32 inches (Btnz, Btn1, and Btn2 horizons)
Xeric moisture regime - These soils receive additional moisture from run-on because of their position on the landscape
ADDITIONAL DATA: Reference samples were collected for analysis at the NSSL. The soil survey sample number is S88ID-047-000