LOCATION HENHOIT                 UT+ID

Established Series
Rev. LBC-JAC-KLS
03/2023

HENHOIT SERIES

The Henhoit series consists of deep, well drained soils that formed in material weathered from conglomerate of sandstone and quartzite. These soils are on mountain slopes. Slopes are 30 to 60 percent. The mean annual precipitation is about 530 mm, and the mean annual air temperature is about 6 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Ultic Argixerolls

TYPICAL PEDON: Henhoit gravelly loam, rangeland. (Colors are for moist soil unless otherwise noted)

Oi--0 to 8 cm; matted leaves, twigs and stems. (3 to 8 cm thick)

A1--8 to 13 cm; dark reddish brown (5YR 3/2) gravelly loam, dark reddish brown (5YR 3/3) dry; moderate fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; 20 percent gravel; moderately acid (pH 5.8); abrupt wavy boundary. (5 to 25 cm thick)

A2--13 to 33 cm; dark reddish brown (5YR 3/3) gravelly loam, reddish brown (5YR 4/4) dry; weak medium subangular blocky structure that parts to weak medium granular; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine and medium, few coarse root; 20 percent gravel; moderately acid (pH 5.8); clear smooth boundary. (0 to 28 cm thick)

Bt1--33 to 71 cm; dark red (2.5YR 3/6) very gravelly clay loam, red (2.5YR 4/6) dry; moderate fine and medium subangular blocky structure; very hard, firm, sticky and plastic; common very fine, fine and medium, few coarse roots; few very fine and fine pores; common thin clay films on faces of peds and in pores; 35 percent gravel and 20 percent cobbles; moderately acid (pH 5.6); clear smooth boundary.

Bt2--71 to 135 cm; dark red (2.5YR 3/6) very gravelly clay loam, red (2.5YR 4/6) dry; moderate coarse and medium subangular blocky structure; very hard, firm, sticky and plastic; few very fine, fine and medium roots; common very fine and few fine pores; common thin clay films on faces of peds and in pores; 35 percent gravel and 25 percent cobbles; moderately acid (pH 5.7); abrupt wavy boundary. (Combined thickness of Bt1 and Bt2 horizons - 35 to 125 cm)

Bt3-- 135 to 160 cm, dark red (2.5YR 3/6) very gravelly clay loam, red (2.5YR 4/6) dry; weak medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; few very fine, fine and medium roots; 40 percent gravel and 25 percent cobbles; slightly calcareous, lime is disseminated; slightly alkaline (pH 7.4). (0 to 56 cm thick)

TYPE LOCATION: Morgan County, Utah; about 6 km southwest of Porterville in Tucker Hollow; about 305 meters west and 150 meters north of SE corner sec. 3, T.2N., R.2E.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--6 to 8 degrees C
Mean summer soil temperature--15 to 21 degrees C
These soils are usually moist but are dry for 50 to 85 consecutive days during the summer.
Thickness of mollic epipedon--25 to 48 cm
Combined thickness of A and Bt horizons--125 to 150 cm or more
Base saturation--less than 75 percent in some or all parts above a depth of 75 cm
Rock fragments--rounded quartzite and sandstone gravel and cobbles

A horizons
Hue--10YR through 5YR
Value--3 through 5 dry, 2 or 3 moist
Chroma--2 through 4 dry, 2 or 3 moist
Texture--loam
Rock fragment content--20 to 45 percent gravel and/or cobbles
Reaction--pH 5.6 to 7.3

Bt horizons
Hue--7.5YR through 2.5YR
Value--4 or 5 dry, 3 or 4 moist
Chroma--3 through 8 dry and moist
Texture--clay loam or loam
Structure--weak to strong, fine to coarse, subangular blocky
Rock fragment content--35 to 70 percent, gravel and/or cobbles
Reaction--pH 5.6 to 7.3

COMPETING SERIES: These are the Durst, Forsey, Holmes, Horrocks, Hoskin, Klicker, Sattley and Stemilt series. Durst, Hoskin and Klicker soils are 60 to 100 cm deep over bedrock. Forsey, Holmes, Horrocks, Hoskin and Stemilt soils have more than 75 percent base saturation in all parts above a depth of 75 cm. Also Forsey, Holmes and Horrocks soils have sola less than 75 cm thick and lack hue as red as 2.5YR in the Bt horizons; Stemilt soils have hue of 10YR only in the Bt horizon. Sattley soils have dominant hue of 10YR but have some 7.5YR hue with chroma of 2 in the Bt horizons and have a solum thickness of less than 125 cm.

GEOGRAPHIC SETTING:
Landform--mountain slopes
Elevation--1575 to 2350 meters
Slope--30 to 60 percent
Parent material--residuum, colluvium, and local alluvium weathered from conglomerate of sandstone and quartzite
Climate--moist subhumid
Mean annual precipitation--460 to 640 mm
Mean annual air temperature--5 to 7 degrees C
Mean summer air temperature--14 to 18 degrees C
Frost-free period--60 to 80 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed.

DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderately slow permeability.

USE AND VEGETATION: These soils are used for range, wildlife habitat, and watershed. The present native vegetation is oakbrush, big sagebrush, bluebunch wheatgrass, mulesear dock, bitterbrush, and slender wheatgrass.

DISTRIBUTION AND EXTENT: Henhoit soils are of small extent in northern Utah; MLRA 47.

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

SERIES ESTABLISHED: Morgan Area, Morgan County, Utah, 1974

REMARKS:
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data.

Converted to metric and O horizons were updated to start at zero. Competing series section was not updated. 01/2023

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National Cooperative Soil Survey
U.S.A.