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Sogn soil and landscape

Soil profile: A representative soil profile of the Sogn series. The shallow, clayey Sogn soils formed directly over limestone.

 

Landscape: In Tallgrass Prairie National Preserve, Labette and Sogn soils dominate the level uplands. (Soil Survey of Tallgrass Prairie National Preserve, Kansas; United States Department of Agriculture, Natural Resources Conservation Service, and United States Department of the Interior, National Park Service)

 

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

 

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.

 

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..The Sogn series is extensive.

 

For additional information about the survey area, visit:

www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/kansas/Tallgra...

 

For a detailed soil description, visit:

soilseries.sc.egov.usda.gov/OSD_Docs/S/SOGN.html

 

For acreage and geographic distribution, visit:

casoilresource.lawr.ucdavis.edu/see/#sogn

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Uploaded on May 12, 2021
Taken in January 2000