LOCATION LADNER NDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Aridic Natrustalfs
TYPICAL PEDON: Ladner loamy fine sand - on an east-facing slopes of 2 percent and under native grass (Colors are for dry soil unless otherwise stated. Where described the soil was dry throughout.)
E--0 to 6 inches; light brownish gray (10YR 6/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure parting to weak fine platy; soft, very friable, nonsticky and nonplastic; many roots in upper part; neutral; abrupt smooth boundary. (3 to 10 inches thick)
Btn1--6 to 8 inches; light brownish gray (2.5Y 6/2) fine sandy loam, dark grayish brown (2.5Y 4/2) moist; strong medium columnar structure; extremely hard, firm, sticky and slightly plastic; common roots along sides of columns; few fine pores; columns coated with very dark grayish brown (10YR 3/2) moist clay films; strongly alkaline; clear wavy boundary.
Btn2--8 to 14 inches; light yellowish brown (2.5Y 6/4) fine sandy loam, olive brown (2.5Y 4/4) moist; moderate medium prismatic structure parting to strong medium angular blocky; extremely hard, firm, sticky and slightly plastic; few roots; few fine pores; thin very dark grayish brown (2.5Y 3/2) moist clay films on faces of prisms; few fine masses of carbonates; strongly alkaline; clear wavy boundary. (Combined Btn horizons 6 to 13 inches thick)
BC--14 to 24 inches; light gray (5Y 7/2) fine sandy loam, olive (5Y 5/3) moist; weak coarse prismatic structure parting to moderate medium angular blocky; very hard, friable, slightly sticky and slightly plastic; few fine roots; strong effervescence; strongly alkaline; gradual wavy boundary. (0 to 10 inches thick)
C--24 to 60 inches; light olive gray (5Y 6/2) fine sandy loam, olive gray (5Y 5/2) moist; massive; very hard, friable, slightly sticky, and slightly plastic; thin strata of loamy fine sand, very fine sand, and loam; strong effervescence; strongly alkaline.
TYPE LOCATION: Bowman County, North Dakota; about 2 miles west and 21 miles south of Marmarth; 2,610 feet south and 1,085 feet west of the northeast corner, sec. 18, T. 129 N., R. 106 W.
RANGE IN CHARACTERISTICS: Some pedons have A horizons less than 4 inches thick.
The E horizon has hue of 10YR or 2.5Y, value of 5 to 7 and 4 or 5 moist, and chroma of 1 or 2. It is loamy fine sand, fine sandy loam or very fine sandy loam. It is neutral or slightly alkaline.
The Btn horizon has hue of 2.5Y or 5Y, value of 5 to 7 and 3 to 5 moist, and chroma of 2 to 4. It is fine sandy loam. It is slightly alkaline to strongly alkaline.
The C horizon is stratified loam, very fine sandy loam, fine sandy loam or loamy fine sand. It is slightly alkaline to strongly alkaline. Some pedons have shale bedrock below 40 inches.
COMPETING SERIES There are no competing series in the same family.
GEOGRAPHIC SETTING: Ladner soils are on level to rolling uplands, terraces and fans. Slopes range from 0 to 12 percent. The soils formed in sediments weathered primarily from sandstone. The climate is cool and semiarid. Mean annual temperature ranges from 39 to 45 degrees F, and mean annual precipitation from 13 to 16 inches. Most of the precipitation falls in the spring and early summer.
GEOGRAPHICALY ASSOCIATED SOILS: These are the Ekalaka, Rhoades, Tally, Telfer, Tusler, Vebar and Zeona soils. Ekalaka, Rhoades, Tally, Telfer and Vebar soils have mollic epipedons and are on nearby fans, terraces and uplands. Tusler soils are sandy and are on nearby uplands. Zeona soils are sandy and in hummocky areas.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is negligible to medium depending on slope. Permeability is slow.
USE AND VEGETATION: Used mainly for range. A few areas are cropped to small grains. Native vegetation consists of needleandthread, blue grama, western wheatgrass, and upland sedges.
DISTRIBUTION AND EXTENT: Southwestern North Dakota. The soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Bowman County, North Dakota, 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are: ochric epipedon and albic horizon - the zone from the surface of the soil to a depth of 6 inches (E horizon); natric horizon - the zone from 6 to 14 inches (Btn1 and Btn2 horizons).