LOCATION ISANDY ID
Tentative Series
IRD BAG
11/2024
ISANDY SERIES
The Isandy series consists of very deep, excessively drained soils formed in alluvium. These soils are on stream and fan terraces. Slopes are 0 to 2 percent. Mean annual precipitation is about 275 mm, and mean annual temperature is about 8 degrees C.
TAXONOMIC CLASS: Sandy-skeletal, mixed, mesic Calcidic Haploxerolls
TYPICAL PEDON: Isandy loamy sand in cropland. (Colors are for dry soil unless otherwise noted).
Ap--0 to 30 cm; brown (10YR 5/3) loamy sand, dark brown (10YR 3/3) moist; moderate fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine roots; common very fine irregular and tubular pores; 8 percent gravel; slightly alkaline (pH 7.6); clear smooth boundary.
A--30 to 48 cm; brown (10YR 5/3) loamy sand, dark brown (10YR 3/3) moist; weak coarse subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; few very fine and fine roots; many very fine irregular and tubular pores; 12 percent gravel; moderately alkaline (pH 8.1); clear wavy boundary.
2Bw--48 to 71 cm; pale brown (10YR 6/3) very gravelly loamy sand, brown (10YR 4/3) moist; single grain; loose, nonsticky and nonplastic; few very fine roots; common very fine irregular and few very fine tubular pores; 45 percent gravel; moderately alkaline (pH 8.1); clear smooth boundary.
2Bk1--71 to 112 cm; pale brown (10YR 6/3) very gravelly sand, brown (10YR 4/3) moist; single grain; loose, nonsticky and nonplastic; few very fine roots; many very fine irregular pores; 2 percent calcium carbonate coats on bottom of rock fragments; noneffervescent; 55 percent gravel; moderately alkaline (pH 8.1); abrupt smooth boundary.
3Bk2--112 to 150 cm; light gray (2.5Y 7/2) sand, grayish brown (2.5Y 5/2) moist; single grain; loose, nonsticky and nonplastic; many very fine irregular pores; 5 percent calcium carbonate coats around rock fragments and sand grains; strongly effervescent; 1 percent gravel; moderately alkaline (pH 8.3).
TYPE LOCATION: Bingham County, Idaho; USGS topographic quadrangle Fort Hall; latitude 43.0592881 degrees north, longitude 112.4663414 degrees west, datum WGS84.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--9 to 10 degrees C
Thickness of mollic epipedon--25 to 50 cm
Depth to calcium carbonates--46 to 91 cm
Depth to calcic horizon--75 to 125 cm
Depth to lithologic discontinuity--15 to 50 cm
Particle-size control section (weighted averages)
Clay content--3 to 8 percent
Rock fragments--35 to 60 percent
Ap and A horizons
Hue--7.5YR or 10YR
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Rock fragments--3 to 30 percent gravel
Reaction--pH 7.4 to 8.3
Thickness--18 to 50 cm
2Bw horizon
Hue--2.5Y or 10YR
Value--6 or 7 dry, 4 or 5 moist
Chroma--2 or 3 dry or moist
Texture (less than 2 mm fraction)--sand, loamy sand
Rock fragments--35 to 75 percent gravel
Reaction--pH 7.6 to 8.1
Thickness--15 to 40 cm
2Bk horizon
Hue--2.5Y or 10YR
Value--6 or 7 dry, 4 or 5 moist
Chroma--2 or 3 dry or moist
Texture (less than 2 mm fraction)--sand, coarse sand
Rock fragments--45 to 75 percent gravel
Reaction--pH 7.6 to 8.1
Thickness--15 to 40 cm
3Bk horizon
Hue--2.5Y or 10YR
Value-- 6 or 7 dry, 4 or 5 moist
Chroma-- 2 or 3 moist
Texture (less than 2 mm fraction)-- sand, coarse sand
Rock fragments--0 to 15 percent gravel
Reaction--pH 7.7 to 8.4
COMPETING SERIES:
Elbboc (UT)--soils are somewhat excessively drained
GEOGRAPHIC SETTING:
Landform--stream and fan terraces
Elevation--1,347 to 1,357 meters
Slope--0 to 2 percent
Parent material--alluvium
Mean annual precipitation--250 to 300 mm
Mean annual air temperature--7 to 8 degrees C
Frost-free period--100 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Excessively drained, 50 to 150 um/sec in the upper part and 150 to 700 um/sec in the lower part
USE AND VEGETATION: Isandy soils are primarily used for irrigated cropland. The potential native vegetation is Indian ricegrass, needle and thread, Sandberg bluegrass, and basin big sagebrush.
DISTRIBUTION AND EXTENT: Isandy soils are of small extent in southeastern Idaho; MLRA 11
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Bingham County, Idaho, 2022. Isandy series is coined.
REMARKS: Diagnostic horizons and other features:
Mollic epipedon--25 to 50 cm (Ap and A horizons)
Calcic horizon--112 to 150 cm (3Bk2 horizon)
Particle-size control section--25 to 100 cm
Isandy soils have a mesic temperature regime and an aridic moisture regime, bordering on xeric.
National Cooperative Soil Survey
U.S.A.