LOCATION PASATIIPE               ID

Tentative Series
IRD BAG
11/2024

PASATIIPE SERIES

The Pasatiipe series consists of very deep, well drained soils that formed in alluvium. These soils are on stream terraces. Slopes are 0 to 5 percent. Mean annual precipitation is about 250 mm, and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, mesic Xeric Haplocalcids

TYPICAL PEDON: Pasatiipe loam in cropland. (Colors are for dry soil unless otherwise stated.)

Ap--0 to 18 cm; light brownish gray (10YR 6/2) loam, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and few fine and medium roots; common very fine and few fine and medium tubular pores; 8 percent calcium carbonate equivalent; slightly effervescent; 3 percent gravel; moderately alkaline (pH 8.4); abrupt smooth boundary.

ABk--18 to 36 cm; pale brown (10YR 6/3) loam; brown (10YR 4/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; many very fine and few fine and medium tubular pores; 13 percent calcium carbonate equivalent; strongly effervescent; 5 percent gravel; strongly alkaline (pH 8.6); clear smooth boundary.

Bk1--36 to 48 cm; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; moderate medium columnar structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine and fine tubular and few medium irregular pores; 35 percent calcium carbonate equivalent; 20 percent calcium carbonate masses throughout matrix; violently effervescent; 1 percent gravel; strongly alkaline (pH 8.8); abrupt wavy boundary.

Bk2--48 to 71 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; moderate very coarse prismatic structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine and fine tubular and few medium irregular pores; 20 percent calcium carbonate equivalent; 30 percent calcium carbonate masses throughout matrix; violently effervescent; 5 percent gravel; strongly alkaline (pH 8.8); clear smooth boundary.

Bk3--71 to 86 cm; very pale brown (10YR 7/3) cobbly loam, brown (10YR 5/3) moist; moderate very coarse prismatic structure; slightly hard, very friable, nonsticky and slightly plastic; common very fine roots; common very fine and fine tubular and few medium irregular pores; 25 percent calcium carbonate equivalent; 20 percent calcium carbonate masses throughout matrix; violently effervescent; 10 percent gravel, 20 percent cobbles; strongly alkaline (pH 8.8); abrupt irregular boundary.

2Bk4--86 to 107 cm; pale brown (10YR 6/3) extremely gravelly loamy fine sand, brown (10YR 4/3) moist; single grain; loose; nonsticky and nonplastic; few very fine roots; many very fine irregular pores; 10 percent calcium carbonate equivalent; 20 percent calcium carbonate coats around rock fragments; violently effervescent; 60 percent gravel, 5 percent cobbles; very strongly alkaline (pH 9.0); clear smooth boundary.

2Bk5--107 to 150 cm; light brownish gray (2.5Y 6/2) very gravelly fine sand, dark grayish brown (10YR 4/2) moist; single grain; loose; nonsticky and nonplastic; few very fine roots; many very fine irregular pores; 10 percent calcium carbonate equivalent; 20 percent calcium carbonate coats around rock fragments; violently effervescent; 50 percent gravel, 2 percent cobbles; very strongly alkaline (pH 9.0).

TYPE LOCATION: Bingham County, Idaho; USGS topographic quadrangle Fort Hall; latitude 43.0806732 degrees north, longitude 112.4794416 degrees west, datum WGS84.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--9 to 10 degrees C
Depth to calcic horizon--15 to 41 cm
Depth to lithologic discontinuity--51 to 91 cm

Particle-size control section (weighted averages)
Clay content--10 to 18 percent in the upper part and 1 to 8 percent in the lower part
Rock fragments--2 to 30 percent in upper part and 50 to 80 percent in the lower part

A and AB horizons
Value--6 or 7 dry, 4 or 5 moist
Chroma--2 or 3 dry or moist
Rock fragments--0 to 10 percent gravel
Calcium carbonate equivalent--5 to 20 percent
Reaction--pH 8.2 to 8.8
Thickness--20 to 50 cm

Bk horizons
Hue--10YR or 2.5Y
Value--6 to 8 dry; 4 to 6 moist
Chroma--3 or 4 dry or moist
Texture (less than 2 mm fraction)--loam, silt loam
Rock fragments--2 to 35 percent-2 to 15 percent gravel, 0 to 20 percent cobbles
Calcium carbonate equivalent--15 to 40 percent
Reaction--pH 8.3 to 9.0
Thickness--30 to 90 cm

2Bk horizons
Hue--10YR or 2.5Y
Value--6 or 7 dry; 4 to 6 moist
Chroma--2 to 4 dry or moist
Texture (less than 2 mm fraction)--loamy fine sand, loamy sand, fine sand, sand
Rock fragments--45 to 85 percent-45 to 70 percent gravel, 0 to 20 percent cobbles
Calcium carbonate equivalent--5 to 25 percent
Reaction--pH 8.4 to 9.0

COMPETING SERIES:
Orcky (UT)--soils have a cambic horizon
Paniogue (ID)--soils have a cambic horizon

GEOGRAPHIC SETTING:
Landform--stream terraces
Elevation--1,350 to 1,360 meters
Slope--0 to 5 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: Well drained; 5 to 15 um/sec in the upper part and 15 to 50 um/sec in the lower part.

USE AND VEGETATION: Pasatiipe soils are primarily used for irrigated cropland. The potential native vegetation is basin wildrye, bluebuch wheatgrass, needle and thread, and basin big sagebrush

DISTRIBUTION AND EXTENT: Pasatiipe soils are of small extent in southeastern Idaho; MLRA 11

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES PROPOSED: Bingham County, Idaho, 2022. Pasatiipe series is coined.

REMARKS: Diagnostic horizons and other features:

Ochric epipedon--0 to 36 cm (Ap and ABk horizons)
Calcic horizon--36 to 150 cm (Bk and 2Bk horizons)

Particle-size control section--25 to 100 cm

Pasatiipe soils have a mesic temperature regime and an aridic moisture regime bordering on xeric.

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National Cooperative Soil Survey
U.S.A.