LOCATION VILLY MT+UT
Established Series
Rev. DES-JAL-KLS
09/2022
VILLY SERIES
The Villy series consists of very deep, poorly drained soils that formed in alluvium. These soils are on flood plains. Slopes are 0 to 2 percent. Mean annual precipitation is about 310 mm, and mean annual air temperature is about 6 degrees C.
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, frigid Typic Fluvaquents
TYPICAL PEDON: Villy silty loam, grassland (colors are for dry soil unless otherwise noted).
Oi--0 to 5 cm; root mat consisting of many live fibrous roots; abrupt smooth boundary. (0 to 8 cm thick)
A--5 to 23 cm; very dark gray (10YR 3/1) silty clay loam, light brownish gray (10YR 6/2) dry; moderate thin platy structure; slightly hard, friable, moderately sticky and slightly plastic; many very fine roots; many very fine tubular and interstitial pores; disseminated lime; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (8 to 18 cm thick)
Cg1--23 to 61 cm; gray (N 5/) silty clay loam, light gray (N 7/) dry; massive; hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; many very fine tubular and interstitial pores; disseminated lime; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (33 to 46 cm thick)
Cg2--61 to 91 cm; dark gray (N 4/) silty clay loam, gray (N 6/) dry; massive; hard, friable, moderately sticky and slightly plastic; few very fine roots; common very fine tubular and interstitial pores; disseminated lime; strongly effervescent; moderately alkaline (pH 8.3); gradual smooth boundary. (25 to 38 cm thick)
2Abg--91 to 106 cm; very dark gray (10YR 3/1) silt loam, gray (10YR 5/1) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; disseminated lime; strongly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (0 to 20 cm thick)
2Cbg--106 to 157 cm; gray (5Y 5/1) silty clay loam, light gray (5Y 7/1) dry; massive; hard, friable, moderately sticky and slightly plastic; disseminated lime; strongly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Broadwater County, Montana; about 490 meters east and 120 meters south of the NW corner of sec. 8, T. 6 N., R. 2 E.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 8 degrees C
Moisture control section--10 to 30 cm (aquic features)
Depth to water table--0 to 60 cm
Sandy-skeletal materials are allowed below a depth of 125 cm
Phases recognized--drained; high elevation greater than 1675 meters
A horizon
Hue--10YR or 2.5Y
Value--5, 6, or 7 dry; 3, 4, or 5 moist
Chroma--1 or 2
Texture--silt loam or silty clay loam
Clay content--18 to 35 percent
Reaction--pH 7.9 to 8.4
Cg horizon(s)
Hue--10YR, 2.5Y, 5Y, or N
Value--6, 7, or 8 dry; 4, 5, or 6 moist
Chroma--0, 1, or 2
Texture--silt loam, silty clay loam, or very fine sandy loam, included are thin strata of loam, silt, and sandy loam
Clay content--18 to 35 percent
Redoximorphic features--7.5YR 4/2, 7.5YR 4/4 or 5Y 4/2, 5Y 4/3
Reaction--pH 7.9 to 8.4
2Abg horizon(s)
Hue--10YR or 2.5Y
Value--4 or 5 dry, 3 or 4 moist
Chroma--0, 1, 2, or 3
Texture--silt loam or silty clay loam
Clay content--18 to 35 percent
Reaction--pH 7.9 to 8.4
COMPETING SERIES:
Schnoorson (ID) - is slightly alkaline below a depth of 100 cm; prismatic structure in the major part of the particle-size control section; has redox concentrations below the Ap horizon.
GEOGRAPHIC SETTING:
Landform--flood plains
Elevation--1075 to 2125 meters
Slope--0 to 2 percent
Parent material--calcareous alluvium
Climate--long, cold winters; moist springs; warm summers
Mean annual precipitation--250 to 360 mm
Mean annual air temperature--3 to 7 degrees C
Frost-free period--80 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND PERMEABILITY: Poorly drained; moderately slow permeability
USE AND VEGETATION: Villy soils are used mainly as grazing for livestock. Some areas are drained and used for irrigated crops.
DISTRIBUTION AND EXTENT: Villy soils are moderately extensive in valleys in southwest Montana and Utah; MLRAs 44B and 47
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Broadwater County, Montana, 1971.
REMARKS: Soil interpretations records: MT0513, MT0514, MT0710, and MT0910.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--5 to 23 cm mixed (A and Cg horizons)
Redoximorphic features--23 to 157 cm (Cg1, Cg2, 2Abg1 and 2Abg2 horizons)
Villy soils have a frigid temperature regime and an aquic soil moisture regime with a typic subclass.
Converted to metric, updated formatting, and O horizons were updated to start at zero. Competing series section was not updated. 9/2022
National Cooperative Soil Survey
U.S.A.