LOCATION SOGN                    KS+NE OK

Established Series


The Sogn series consists of shallow and very shallow, somewhat excessively drained, soils that formed in residuum weathered from limestone. Sogn soils are on hillslopes on uplands in Bluestem Hills, MLRA 76. Slopes range from 0 to 45 percent. Mean annual precipitation is about 840 millimeters (33 inches), and mean annual temperature is about 13 degrees C (55 degrees F) at the type location.

TAXONOMIC CLASS: Clayey, mixed, superactive, mesic Lithic Haplustolls

TYPICAL PEDON: Sogn silty clay loam - on a south facing, linear, 1 percent slope in rangeland at an elevation of 420 meters (1378 feet). (Colors are for dry soil unless otherwise stated.) As described on November 5, 2014.

A1--0 to 13 centimeters (0 to 5 inches); very dark gray (10YR 3/1) silty clay loam, black (10YR 2/1) moist; weak medium subangular blocky structure parting to moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine roots; 3 percent fine and medium limestone gravel; strong effervescence; slightly alkaline; abrupt smooth boundary.

A2--13 to 18 centimeters (5 to 7 inches); very dark gray (10YR 3/1) very channery silty clay loam, black (10YR 2/1) moist; weak medium subangular blocky structure parting to moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots and common fine roots; 40 percent limestone channers; strong effervescence; slightly alkaline; abrupt smooth boundary. (10 to 49 centimeters (4 to 20 inches) thick, A1 and A2 horizons)

R--18 centimeters (7 inches); level-bedded indurated limestone that has joints averaging about 46 centimeters (18 inches) apart and less than 1 centimeter (1/4 inch) wide, cracks are filled with dark colored soil.

TYPE LOCATION: Geary County, Kansas; about 16 kilometers (10 miles) east and 1.6 kilometers (1 mile) south of Junction City, about 107 meters (350 feet) east and 23 meters (75 feet) south of the northwest corner, sec. 15, T. 12 S., R. 7 E.; Ogden USGS quadrangle; latitude 39 degrees 0 minutes 54.0 seconds N. and longitude 96 degrees 38 minutes 57.7 seconds W., WGS84.

Soil moisture regime: Ustic bordering on Udic
Soil temperature regime: mesic
Mollic epipedon thickness: 10 to 49 centimeters (4 to 20 inches)
Depth to lithic contact: 10 to 49 centimeters (4 to 20 inches)
Particle-size control section (weighted average):
Clay content: 35 to 44 percent
Sand content: 2 to 14 percent
Rock fragments: 0 to 34 percent limestone gravels and channers
Some pedons do not contain free carbonates above the bedrock.

A horizon:
Hue: 7.5YR to 2.5Y
Value: 2 or 3 moist, 3 to 5 dry
Chroma: 1 to 3 moist or dry
Texture: Silty clay loam, silty clay, and their gravelly or channery to very channery counterparts
Clay content: 33 to 44 percent
Rock fragments: 0 to 60 percent limestone gravel and channers
Calcium to carbonate equivalent: 0 to 14 percent
Reaction: Neutral to moderately alkaline

Note: Usually the channery to very channery textures occur in a horizon right above the bedrock

COMPETING SERIES: There are no competing series

Parent material: residuum derived from limestone
Landform: hillslopes on uplands
Slopes: 0 to 45 percent
Elevation: 300 to 505 meters (980 to 1650 feet)
Mean annual air temperature: 12 to 14 degrees C (53 to 58 degrees F)
Mean annual precipitation: 810 to 1060 millimeters (32 to 42 inches)
Precipitation pattern: Precipitation is usually evenly distributed throughout the year with the exception of November through February being the driest months and May and June being the wettest months. Summer precipitation occurs during intense summer thunderstorms.
Frost-free period: 160 to 200 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clime, Kipson, and Labette soils.
Cllime soils are more than 50 centimeters (20 inches) to bedrock and generally occur on slopes below the Sogn soils.
Kipson soils are shallow over interbedded shale and limestone and occur on similar positions.
Labette soils have an argillic horizon and are generally on slightly higher positions.

Drainage: somewhat excessive
Runoff: medium to high
Saturated Hydraulic Conductivity: moderately high

USE AND VEGETATION: Almost all areas are used for rangeland.
Native vegetation is a tall-and mid-grass prairie.
Sideoats grama, big bluestem, and little bluestem are dominant.

DISTRIBUTION AND EXTENT: Mostly in eastern Kansas, and widely spaced small areas are in western Missouri, eastern Iowa and Nebraska, northwestern Illinois, southeastern South Dakota, southern Minnesota, and southwestern Wisconsin; Land Resource Region H; Central Great Plains Winter Wheat and Range Region, MLRA 74, Central Kansas Sandstone Hills; MLRA 76, Bluestem Hills; Land Resource Region M; Central Feed Grains and Livestock Region, MLRA 102C, Loess Uplands; MLRA 103, Central Iowa and Minnesota Till Prairies; MLRA 105, Northern Mississippi Valley Loess Hills; MLRA 106 Nebraska and Kansas Loess-Drift Hills; MLRA 107B, Iowa and Missouri Deep Loess Hills; MLRA 108B, Illinois and Iowa Deep Loess and Drift, Eastern Part; MLRA 112, Cherokee Prairies.The Sogn series is extensive.


SERIES ESTABLISHED: Goodhue County, Minnesota; 1913.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: the zone from 0 to 23 centimeters (0 to 9 inches) (A horizons)
Mollic epipedon: the zone from 0 to 23 centimeters (0 to 9 inches) (A horizons)
Lithic contact: around 23 centimeters (9 inches) (R horizons)

date: 05/13/99 SAG
expanded slope range due to the Gage County, Nebraska update

Date: 5/00 JCR
Changed format of OSD to semi-tabular from narrative
Changed runoff from medium to rapid to medium to high
Added Soil Interpretation Record sand content to "Range In Characteristics" and frost-free period to Geographic setting.

Modified format by LRM in 3/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.

02/2016 BKN Type location was redescribed and sampled for KSSL lab analysis. Sogn was sampled in two other areas within MLRA 76 and sent to KSSL for lab analysis. All the lab data came back Clayey. Changed classification from Loamy to Clayey. Updated intro to current standards. Updated slope range and converted precipitation from centimeters to millimeters. Updated typical pedon description. Added quadrangle, latitude, longitude, and datum to type location. Added A2 horizon description. Changed particle size class to Fine. Updated particle size control section clay and sand content. Added textures silty clay, gravelly silty clay loam, gravely silty clay, channery silty clay loam, channery silty clay, very channery silty clay loam, and very channery silty clay. Removed soils listed as competing series. Updated geographically associated soils by adding Kipson and deleting Apache and Venezia. Added precipitation pattern and elevation to geographic setting. Added LRRs and MLRAs to distribution and extent. Changed MO responsible to Salina, KS. Added lab data to additional data.

Additional data: Kansas State University Pedology Laboratory data is available for Pedon ID 1988KS061063. Kellogg Soil Survey Laboratory data is available for Pedon IDs S2014KS015500, S2014KS061500, and S2014KS149500.

National Cooperative Soil Survey