LOCATION TURBYFILL ID+OREstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Xeric Torriorthents
TYPICAL PEDON: Turbyfill fine sandy loam, range. (Colors are for dry soil unless otherwise noted.)
A1--0 to 3 inches; light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; weak very fine granular structure; soft, very friable; many very fine, fine and medium roots; slightly calcareous; moderately alkaline (pH 8.1); clear wavy boundary. (0 to 5 inches thick)
C1--3 to 21 inches; light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable; many very fine, fine and medium roots; few very fine tubular pores; moderately calcareous; moderately alkaline (pH 8.2); gradual smooth boundary. (6 to 20 inches thick)
C2ca--21 to 32 inches; light gray (10YR 7/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, many very fine and fine roots; common very fine tubular pores; few hard nodules or (cicada) krotovinas with slight segregations of lime outside; moderately calcareous; moderately alkaline (pH 8.3); clear smooth boundary. (6 to 15 inches thick)
C3ca--32 to 47 inches; light gray (10YR 7/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable; about 40 percent hard, rounded nodules or (cicada) krotovinas, 1/2 to 3/4 inch in diameter and 1/2 to 1 inch long; many very fine and fine roots between nodules, few within; common very fine tubular pores; moderately calcareous; strongly alkaline (pH 8.6); clear smooth boundary. (5 to 17 inches thick)
C4ca--47 to 62 inches; light gray (10YR 7/2) light fine sandy loam, brown (10YR 4/3) moist; massive; soft, very friable; many very fine and fine roots; common very fine pores; moderately calcareous; moderately alkaline (pH 8.2).
TYPE LOCATION: Canyon County, Idaho; 900 feet north and 50 feet west of the SE corner of section 15, T.1N., R.3W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 49 to 54 degrees F. and the mean summer soil temperature at a depth of 20 inches is 66 to 74 degree F. The 10 to 40 inch control section is fine sandy loam or sandy loam and contains less than 18 percent clay and less than 15 percent rock fragments. In some pedons, gravel is scattered throughout the profile. Organic matter content is low or moderately low and decreases regularly with depth to less than 0.35 percent above depth of 50 inches.
The A horizon has hue of 10YR or 2.5Y, value of 5 through 7 dry, 3 through 5 moist, and chroma of 2 or 3. When mixed to depth of 7 inches, it is not both darker in value than 5.5 dry and 3.5 moist, both broken and rubbed. It is noncalcareous to moderately calcareous and is neutral to moderately alkaline.
The C horizon is massive or has weak subangular blocky structure. It is moderately or slightly calcareous and moderately to strongly alkaline. The Cca horizon has moderate or weak accumulation of carbonates, but contains less than 15 percent in any layer at least 6 inches thick, and it is not cemented.
COMPETING SERIES: These are the Heistseries in the same family and the Lolalita, Mazuma and Oasis series. Oasis soils have an organic matter content that decreases irregularly with depth. Mazuma soils are dry more than 3/4 of the time the soil temperature at 20 inches exceeds 41 degrees F. Lolalita soils are noncalcareous to 2 feet or deeper. Heist soils have a 7.5YR hue, chroma of 4 and a weakly cemented Cca horizon.
GEOGRAPHIC SETTING: The soils are in alluvial fans and terraces and in alluvium on basalt plains at elevations of 2,000 to 4,500 feet. Slopes are predominantly less than 7 percent and range from 0 to 35 percent. The soils formed in silty alluvium or eolian deposits. The climate is middle latitude steppe (Trewartha's Modified Koppen system) and has dry summers. The frost free period is 110 to 160 days, and mean annual precipitation is 7 to 11 inches including 0.5 to 2 feet of snow. The mean annual temperature is 47 to 52 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cencove, Feltham, Garbutt, Letha, Quincy and Scism soils. Letha soils are not usually dry and high exchangeable sodium. Cencove soils have contrasting textures. Feltham soils are dominantly loamy sand between depths of 10 and 40 inches. Garbutt soils are coare silty. Quincy soils are sandy. Scism soils have silt loam texture throughout.
DRAINAGE AND PERMEABILITY: Well drained; slow to very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Mostly irrigated cropland. Principal crops are small grains, vegetables and vegetable seed, corn, beans, sugar beets, potatoes, alfalfa,hay, pasture, apple, plum, cherry and peach orchards. Noncultivated areas support sagebrush, Thurber needlegrass, bluebunch ; wheatgrass, winterfat, cheatgrass, Sandberg bluegrass, and annual weeds.
DISTRIBUTION AND EXTENT: Southern Idaho and southeastern Oregon. The soils are moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Payette County, Idaho, 1971.