LOCATION YECROSS                 SD+ND

Established Series
TMS-DJW-MLR
08/2026

YECROSS SERIES

The Yecross series consists of very deep, somewhat excessively drained soils formed in sandy glacial outwash sediments on uplands. Permeability is rapid. Slopes range from 0 to 15 percent. Mean annual temperature is about 4 degrees C (43 degrees F), and mean annual precipitation is about 432 millimeters (17 inches)

TAXONOMIC CLASS: Mixed, frigid Typic Ustipsamments

TYPICAL PEDON: Yecross loamy sand - on a slope of less than 1 percent in native grass. When described the soil was dry throughout. (Colors are for dry soil unless otherwise stated)

A--0 to 21 cm (0 to 8 in); dark gray (10YR 4/1) loamy sand, very dark gray (10YR 3/1) moist; weak medium and fine granular structure; soft, very friable; many fine roots; neutral; clear wavy boundary. (13 to 26 cm thick [5 to 10 in])

C1--21 to 101 cm (8 to 40 in); brown (10YR 5/3) sand, brown (10YR 4/3) moist; single grained; loose; few fine roots in upper part; slight effervescence; slightly alkaline; gradual wavy boundary. (64 to 200 cm thick [25 to 79 in])

C2--101 to 152 cm (40 to 60 in); grayish brown (10YR 5/2) gravelly sand, dark grayish brown (10YR 4/2) moist; single grained; loose; about 15 percent by volume of rock fragments up to 250 mm (1 in) in diameter; few rock fragments of shale; slight effervescence; moderately alkaline.

TYPE LOCATION: Major Land Resource Area 53B - Central Dark Brown Glaciated Plains; Campbell County, South Dakota; about 8 miles south and 4 miles east of Mound City; 1,245 feet north and 42 feet east of the southwest corner of sec. 27, T. 125 N., R. 76 W.; USGS Selby NE topographic quadrangle; latitude 45.6117652, longitude -100.0271875, WGS84.

RANGE IN CHARACTERISTICS: Depth to carbonates typically is 20 to 25 cm (8 to 10 in) but ranges from 0 to 50 cm (0 to 20 in). Colors with moist values of less than 3.5 extend below depths of 25 cm (10 in) in some pedons but lack sufficient organic carbon to qualify for mollic epipedons. The control section ranges from loamy sand to coarse sand, of which more than 50 percent of the sand is medium or coarse. Coarse fragments range from 1 to 20 percent by volume throughout the profile.

The A horizon has hue of 10YR or 2.5Y, value of 4 or 5 and 2 or 3 moist, and chroma of 1 or 2 dry or moist. It is loamy sand, loamy fine sand, or sandy loam and is neutral or slightly alkaline.
Some pedons have a thin Bw or Bk horizon less than 15 cm thick. These horizons have slight to strong effervescence and have gravelly loamy sand, loamy sand and sandy loam textures.

The C horizon has hue of l0YR or 2.5Y, value of 5 to 7 and 4 to 6 moist, and chroma of 2 to 4 dry or moist. It is sand or coarse sand and can have gravelly strata within the C horizons. It is slightly alkaline or moderately alkaline. Thin layers of contrasting finer-textured material are below depths of 61 cm (24 in) in some pedons as are thin buried A horizons.

COMPETING SERIES: These are the Beisigl, Blanchard, Kenray, Seroco and Zilditloi soils. Beisigl soils are moderately deep to paralithic contact. Blanchard and Seroco soils contain less than 50 percent medium and coarser sand in the control section. In addition, Seroco soils do not have carbonates within depths of 50 cm (20 in). Kenray and Zilditloi soils are very deep to carbonates.

GEOGRAPHIC SETTING: The Yecross soils are on nearly level to strongly sloping uplands. Slope gradients are dominantly less than 6 percent but range from 0 to 15 percent. They formed in sandy glacial outwash sediments. Mean annual air temperature is 40 degrees to 45 degrees F., and mean annual precipitation ranges from 15 to l8 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lehr, Lihen, Tally, Wabek and Marysland soils. Lehr and Wabek soils occupy similar positions in the landscape. Lehr soils have mollic epipedons and are fine-loamy over sandy or sandy-skeletal. Lihen soils Lihen soils are in concave swales and foot slopes. Wabek soils are sandy-skeletal. Tally soils are coarse-loamy and are on nearby landscapes. Marysland soils have aquic conditions within 30 cm (12 in) and are in swales.

DRAINAGE AND PERMEABILITY: Somewhat excessively drained. Very slow runoff. Rapid permeability.

USE AND VEGETATION: Mainly used for rangeland, but some areas are farmed mainly to small grain. Native vegetation is sand bluestem, prairie sandreed, little bluestem, needleandthread, sand dropseed, blue grama, sedges and shrubs.

DISTRIBUTION AND EXTENT: North-central South Dakota and central and eastern North Dakota. This series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Walworth County, South Dakota, 4/75.

REMARKS: A deep water table and redoximorphic features are present in some pedons below 120cm (4 feet) but may not always be expressed in sandy textures.

Diagnostic horizons and features recognized in this pedon are: Ochric epipedon: 0 to 21 cm (0 to 8 in) (A horizon).

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National Cooperative Soil Survey
U.S.A.