LOCATION DOVRAY MN+ND SD
Established Series
HRF-CJH
07/2015
DOVRAY SERIES
The Dovray series consists of deep poorly and very poorly drained soils that formed in clayey glacial lacustrine sediments or till on glacial lake plains and moraines. These soils have slow and very slow permeability. They have slopes of 0 to 2 percent. Mean annual precipitation is about 22 inches, and mean annual air temperature is about 44 degrees F.
TAXONOMIC CLASS: Fine, smectitic, frigid Cumulic Vertic Epiaquolls
TYPICAL PEDON: Dovray clay with a nearly level concave slope in a depression on a glacial lake plain in a cultivated field. (Colors are for moist conditions unless otherwise stated)
Ap--0 to 10 inches; black (N 2/0) clay; moderate fine subangular blocky structure; hard; slightly alkaline; clear smooth boundary.
A--10 to 33 inches; black (N 2/0) clay; few fine prominent dark yellowish brown (10YR 4/4) redoximorphic concentrations; moderate very fine angular blocky structure; firm; few gypsum crystals in upper part; neutral; gradual smooth boundary. (Combined A horizons 6 to 51 inches thick)
ABg--33 to 43 inches; very dark gray (5Y 3/1) clay; moderate very fine angular blocky structure; firm; neutral; gradual smooth boundary. (0 to 20 inches thick)
Bg--43 to 56 inches; olive gray (5Y 5/2) clay; many medium prominent brown (7.5YR 4/4) and dark yellowish brown (10YR 4/4) redoximorphic concentrations; moderate fine subangular blocky structure; firm; neutral; clear smooth boundary. (0 to 32 inches thick)
Cg--56 to 60 inches; light olive gray (5Y 6/2) clay; many fine prominent dark yellowish brown (10YR 4/4) redoximorphic concentrations; massive; firm; few streaks and threads of lime; strong effervescence; slightly alkaline.
TYPE LOCATION: Lac qui Parle County, Minnesota; about 9 miles east and 1 mile north of Madison; about 900 feet south and 25 feet west of the northeast corner, sec. 22, T. 118 N., R. 43 W.
RANGE IN CHARACTERISTICS: The sola are 28 to 60 inches thick. Depth to carbonates ranges from 20 to 60 inches. These soils typically lack rock fragments. However, some pedons have as much as 5 percent of rock fragments of mixed lithology in part to all of the solum or C horizon or both. Some pedons have an 0 horizon as thick as 4 inches. The mollic epipedon is 24 to 54 inches thick. The 10- to 40-inch particle-size control section typically averages between 40 and 60 percent clay; however in some pedons material with less clay in the lower part of the control section results in an average between 35 and 40 percent; it has less than 15 percent sand. These soils typically have texture of silty clay or clay throughout the solum, but some pedons have silty clay loam or clay loam in the lower part.
The A horizon has hue of 10YR, 2.5Y or 5Y, value of 2 or 3 or is N 2/0 or N 3/0. It lacks redoximorphic features in some pedons. It has dark-colored iron or manganese oxide coatings or concretions in some pedons. It lacks gypsum crystals in many pedons. It is slightly acid to slightly alkaline.
The Bg horizon has hue of 2.5Y or 5Y, value of 3 to 6, and chroma of 1 or 2. It is neutral or slightly alkaline. Some pedons have a Bkg horizon.
The C horizon has hue of 2.5Y or 5Y, value of 4 to 6, and chroma of 1 or 2. It is typically silty clay or clay, but clay loam or silty clay loam are within a depth of 40 inches in some pedons. In addition, loam or silty loam are below depths of 40 inches in some pedons. It is neutral to moderately alkaline. It lacks secondary carbonates in some pedons.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils have concave slopes with gradient of 0 to 2 percent in depressions and drainageways on ground moraines and glacial lake plains. They formed in clayey glacial lacustrine sediments, or in clayey till, or in clayey lacustrine sediments over clayey till. These deposits are Late Wisconsinian in age. Mean annual air temperature ranges from 40 to 45 degrees F, and mean annual precipitation from 18 to 26 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Fargo,
Nutley,
Sinai and
Fulda soils which are members of a hydrosequence with the Dovray soils; on large glacial lakes, Dovray may be associated with
Bearden soils. Fargo soils are poorly drained and are on adjacent plane sloping areas. The Nutley soils are well or moderately well drained and are on convex slopes. The Sinai soils are moderately well drained and are on plane to slightly concave slopes. The Fulda soils are poorly drained and are on flats. Somewhat poorly drained Bearden soils are-fine-silty and have a calcic horizon. In some places the well drained
Hattie and
Forman, the moderately well drained
Aastad, and the poorly drained
Hegne soils are associates. The Hegne soils have a calcic horizon and developed in materials similar to Dovray. The Hattie, Forman and Aastad soils formed in glacial till.
DRAINAGE AND PERMEABILITY: Poorly and very poorly drained. Permeability is slow and very slow. Runoff is ponded. Frequently ponded unless artificially drained.
USE AND VEGETATION: Most areas are drained and cultivated. Corn, soybeans, and small grains are the principal crops. Undrained areas commonly are used for growing hay or pasture. Native vegetation was tall prairie grass.
DISTRIBUTION AND EXTENT: Western Minnesota, eastern North Dakota, and South Dakota. Moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Marshall County, South Dakota, 1970.
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface of the soil to a depth of 43 inches (Ap, A, and ABg horizons).
National Cooperative Soil Survey
U.S.A.