LOCATION JARRE CO
Established Series
Rev. RHM/SJJ
04/2016
JARRE SERIES
Typically, Jarre soils have grayish brown, very friable, granular A horizons, brown, gravelly light clay loam B2t horizons having prismatic to subangular blocky structure, and light brownish gray very gravelly sandy loam, neutral C horizons.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Aridic Argiustolls
TYPICAL PEDON: Jarre loam - grassland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 5 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; strong very fine granular structure; soft, very friable, slightly sticky, slightly plastic; 5 percent fine gravel; neutral; clear smooth boundary. (4 to 6 inches thick)
B1--5 to 8 inches; brown (7.5YR 5/3) heavy loam, dark brown (7.5YR 3/3) moist; weak medium prismatic structure that parts to medium subangular blocks; slightly hard, very friable, slightly sticky, slightly plastic; peds are hard, friable; thin clay films on some peds and in root channels and pores; 10 percent gravel; neutral; clear smooth boundary. (3 to 4 inches thick)
B2t--8 to 19 inches; brown (7.5YR 5/4) gravelly light clay loam, brown (7.5YR 4/4) moist; moderate medium prismatic structure that parts to medium subangular blocks; slightly hard, very friable, slightly sticky, slightly plastic; peds are very hard, firm; nearly continuous clay films on peds and in root channels and pores; 20 percent fine gravel; neutral; clear smooth boundary. (5 to 14 inches thick)
B3--19 to 24 inches; light brownish gray (2.5Y 6/2) gravelly heavy sandy loam, grayish brown (2.5Y 5/2) moist; weak coarse subangular blocky structure; slightly hard, very friable, peds are hard, very friable; thin clay films on some peds and in some root channels and pores; weak clay bridges between some sand grains; 25 percent gravel; neutral; gradual wavy boundary. (3 to 6 inches thick)
IIC--24 to 60 inches; light brownish gray (2.5Y 6/2) very gravelly sandy loam, grayish brown (2.5Y 5/2) moist; massive; slightly hard, very friable; 60 percent gravel; neutral.
TYPE LOCATION: Douglas County, Colorado; 1,320 feet west and 550 feet north of the SW corner of Sec. 32, T. 10 S., R. 65 W.
RANGE IN CHARACTERISTICS: Jarre soils typically are noncalcareous throughout and depth to uniformly calcareous material ranges from 40 to more than 60 inches. Base saturation typically is greater than 80 percent and ranges from 60 to 100 percent. Rock fragments range from 0 to 35 percent by volume in a major part of the solum but increase to more than 35 percent in the C horizon. They range from 1/8 to 10 inches in diameter but are predominantly less than 3 inches in diameter. The solum and C horizons range from slightly acid to slightly alkaline. The mean annual soil temperature is 46 degrees F., and the mean summer summer soil temperature is 63 degrees F.
The A horizon has hue of 2.5Y through 7.5YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 through 3.
The B2t horizon has hue of 2.5Y through 7.5YR, value of 5 through 7 dry, 3 through 6 moist, and chroma of 1 through 6. It is typically loam or clay loam and has 18 to 35 percent clay, 20 to 50 percent silt, and 20 to 55 percent sand with less than 35 percent being fine or coarser sand.
The C horizon normally has hue of 2.5Y through 7.5YR. Subhorizons redder than 7.5YR occur in some pedons. This horizon is gravelly or very gravelly sandy loam with less than 18 percent clay.
COMPETING SERIES: These are the
Assinniboine,
Bostwick,
Cheesman,
Duffson,
Evanston,
Joplin,
Kevin,
Marmarth,
Morval,
Perrypark,
Peyton,
Telstad,
Turret, and
Villa Grove series. Cheesman, Marmarth, and Duffson soils have bedrock at depths of less than 40 inches. Assinniboine, Evanston, Joplin, Kevin, Morval, Telstad, and Villa Grove soils are calcareous in the lower part of the solum and in the C horizon and have continuous horizons of secondary calcium carbonate accumulation. Bostwick, Perrypark, Turret and Peyton soils have less than 35 percent fine or coarser sand in the B2t horizon and have less than 35 percent rock fragments in the C horizons. Perrypark soils have hue of 5YR or redder. Peyton soils have a large proportion of medium, coarse, and very coarse angular granite sand in their sand fraction.
GEOGRAPHIC SETTING: These soils are on alluvial fans or old terrace levels. Slope gradients range from 1 to 30 or more percent. The soils formed in thick gravelly or very gravelly pedisediments derived from mixed sources. At the type location the average annual precipitation is 17 inches, with peak period of precipitation occurring in the spring and summer.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Pring soils and the competing
Peyton soils. Pring soils have less than 18 percent clay in their B2t horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium to slow runoff; moderate permeability.
USE AND VEGETATION: These soils are used as native pastureland and as dry or irrigated cropland. Native vegetation is mainly grama, western wheat, and needleandthread grasses.
DISTRIBUTION AND EXTENT: The foothill areas of east-central Colorado. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Douglas County, Colorado, 1974.
REMARKS: Last updated by the state 8/74.
National Cooperative Soil Survey
U.S.A.