LOCATION TINDAHAY IDEstablished Series
TAXONOMIC CLASS: Sandy, mixed, mesic Xeric Torriorthents
TYPICAL PEDON: Tindahay loamy coarse sand - rangeland. (Colors are for air-dry soil unless otherwise noted.)
A1--0 to 2 inches; grayish brown (10YR 5/2) loamy coarse sand, very dark grayish brown (10YR 3/2) moist; weak thin platy structure; soft, very friable; nonsticky and nonplastic; many very fine and fine roots; many very fine interstitial pores; 20 percent dark sand; neutral (pH 7.1); clear smooth boundary.
A2--2 to 6 inches; pale brown (10YR 6/3) loamy coarse sand, dark brown (10YR 3/3) moist; weak very thin platy structure parting to weak very fine granular; soft, very friable; nonsticky and nonplastic; many very fine and fine roots; common very fine tubular pores; neutral (pH 6.6); clear smooth boundary.
A3--6 to 13 inches; brown (10YR 5/3) sandy loam, dark brown (10YR 3/3) moist; weak coarse subangular blocky structure; soft, very friable; nonsticky and nonplastic; common very fine and fine roots; common very fine tubular pores; 20 percent dark sand; neutral (pH 6.6); clear smooth boundary. (Combined A horizon - 7 to 25 inches thick.)
AC--13 to 19 inches; brown (10YR 5/3) loamy coarse sand, dark brown (10YR 3/3) moist; very weak coarse subangular blocky structure; slightly hard, very friable; nonsticky and nonplastic; few very fine and fine roots; common very fine tubular pores; 20 percent dark sand; 5 percent fine gravel; neutral (pH 6.9); clear smooth boundary. (0 to 10 inches thick)
C1--19 to 24 inches; pale brown (10YR 6/3) loamy coarse sand, brown (10YR 4/3) moist; massive; soft, very friable; nonsticky and nonplastic; few very fine and fine roots; common very fine tubular pores; 25 percent dark sand; 7 percent fine gravel; neutral (pH 7.0); clear smooth boundary. (4 to 40 inches thick)
C2--24 to 36 inches; light brownish gray (10YR 6/2) coarse sand, dark grayish brown (10YR 4/2) moist; massive; soft, very friable; nonsticky and nonplastic; few very fine and fine roots; common very fine tubular pores; 25 percent dark sand; 5 percent fine gravel; slightly calcareous; slightly alkaline (pH 7.6); clear wavy boundary.
C3--36 to 60 inches; light gray (10YR 7/1) and dark gray (10YR 4/1) sand, grayish brown (10YR 5/2) and black (10YR 2/1) moist; single grained; loose; nonsticky and nonplastic; few very fine and fine roots; many very fine interstitial pores; 25 percent dark sand; 2 percent fine gravel; slightly calcareous; slightly alkaline (pH 7.6).
TYPE LOCATION: Bingham County, Idaho; 1 mile west of Fort Hall Indian Agency and 30 feet south of the gravel road; near the SE corner of the NE1/4 section 34, T.4S., R.34E.; USGS Fort Hall Quadrangle.
RANGE IN CHARACTERISTICS : The mean annual soil temperature is 47 to 55 degrees F. Depth to carbonates is 20 inches or more. Depth to bedrock is 60 inches or more. The 10- to 40-inch control section averages 4 to 10 percent clay and 75 to 90 percent sand. Horizons 3 to 15 inches thick occur within the upper 10 to 25 inches of the particle-size control section that are sandy loam, fine sandy loam, or coarse sandy loam with clay content of 7 to 18 percent. Textures below this layer are sand, coarse sand, loamy coarse sand or loamy sand with 0 to 8 percent clay and 0 to 25 percent fine gravel.
The A or Ap horizons have hue of 10YR or 2.5Y, value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 or 3 moist and dry. The dark color in some pedons is due partly to the dark sands. It is noncalcareous. It is neutral or slightly alkaline.
The AC and upper C horizons have hue of 10YR or 2.5Y, value of 5 through 7 dry, 3 through 6 moist and chroma of 2 through 4 moist and dry. It is neutral or slightly alkaline.
Lower C horizons are commonly present that are slightly or moderately alkaline with 1 to 5 percent calcium carbonate.
COMPETING SERIES: These are the Emberton, Fadoll, Feltham and Rovana series. Emberton soils are 20 to 40 inches to bedrock. Fadoll soils have 10 to 20 percent durinodes in Bq horizons and very gravelly textures at depths of 30 to 40 inches. Feltham soils have horizons below 25 inches with textures finer than loamy fine sand. Ravana soils have a mean annual soil temperature of 55 to 59 degrees F.
GEOGRAPHIC SETTING: Tindahay soils are on alluvial fans, fan piedmonts and extremely dissected terraces, in places modified by wind into low hummocks. Slopes are 0 to 30 percent. Elevations range from about 2,000 to 4,700 feet. The soils formed in mixed alluvium or eolian deposits. Mean annual precipitation is 8 to 12 inches, including up to 2 feet of snow. Frost-free period of 100 and 160 days and mean annual temperature is 45 to 53 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chedehap, Feltham, Escalante, and Quincy soils. Chedehap and Escalante soils are coarse-loamy. Quincy soils do not have textures finer than loamy fine sand in the particle-size control section.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; slow to rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Tindahay soils are used primarily for rangeland. Some areas are irrigated for hay, pasture, corn, beans, potatoes, small grains and fruit trees. Native vegetation is big sagebrush, Indian ricegrass, bluebunch wheatgrass, Thurbers needlegrass, needleandthread and fourwing saltbush.
DISTRIBUTION AND EXTENT: Extensive in the Snake River Plains of Idaho; MLRA 11..
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Payette County, Idaho, 1971.
REMARKS: Diagnostic horizons and other features recognized in this pedon:
Ochric epipedon - zone 0 to 19 inches (A1, A2, A3 and AC horizons)
Particle-size control section - zone 10 to 40 inches
Soil moisture regime - aridic bordering xeric