HomeSoil seriesClarksville
Clarksville soil series
Clarksville soils cover 2,809,831 mapped acres, mostly in Missouri, Oklahoma and Arkansas. USDA rates shrink-swell a limit for houses without basements on under 1% of that land, and a shallow water table a limit for basements on 0%.
It is the leading soil series by area in 18 of the counties and cities on this site, including Delaware County, OK; Adair County, OK; Carter County, MO.
SSURGO survey versions to August 5, 2026 · series description revised 2004-06
of its land: shrink-swell limits houses without basements
of its land: a shallow water table limits basements
median highest linear extensibility (6% and up is high)
median highest clay content in the top 150 cm
USDA's description
The Clarksville series consists of very deep, somewhat excessively drained soils formed in hillslope sediments and the underlying clayey residuum from cherty dolomite or cherty limestone on steep side slopes and narrow ridgetops. Slopes range from 1 to 70 percent. Mean annual precipitation is 43 inches, and mean annual temperature is 55 degrees F.
Source: USDA NRCS series description (OSD) for Clarksville, revised 2004-06. Read it.
Engineering properties
| Mapped area (SSURGO) | 2,809,831 acres |
| Shrink-swell limits houses without basements | 0.1% |
| Shallow water table limits basements | 0.0% |
| Very limited for septic absorption fields | 83.9% |
| Most common drainage class | Somewhat excessively drained |
| Most common hydrologic soil group | B |
| Taxonomic class | Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults |
| Type location | Shannon County, Missouri |
Where Clarksville is mapped
| State | Mapped acres |
|---|---|
| Missouri | 1,426,357 |
| Oklahoma | 601,830 |
| Arkansas | 575,295 |
| Tennessee | 87,273 |
| Alabama | 80,317 |
| Illinois | 19,860 |
| Kentucky | 11,229 |
| Kansas | 7,669 |
Places where Clarksville leads
Counties and cities where Clarksville covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| Delaware County, OK | 36% |
| Adair County, OK | 36% |
| Carter County, MO | 32% |
| Cherokee County, OK | 28% |
| Dent County, MO | 27% |
| Wright County, MO | 24% |
| Benton County, AR | 24% |
| Ottawa County, OK | 22% |
| Pulaski County, MO | 21% |
| Union County, TN | 21% |
| Wayne County, MO | 19% |
| Reynolds County, MO | 17% |
| Mayes County, OK | 17% |
| Christian County, MO | 16% |
| Ripley County, MO | 16% |
| Madison County, MO | 15% |
| Shannon County, MO | 13% |
| Iron County, MO | 13% |
Other places where Clarksville is a main soil
Counties and cities where Clarksville is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.
Counties
- Laclede County, MO 16%
- Calhoun County, AL 13%
- Searcy County, AR 12%
- Marion County, AR 12%
- Oregon County, MO 12%
- Butler County, MO 12%
- Carroll County, AR 12%
- Newton County, MO 11%
- Barry County, MO 11%
- Independence County, AR 11%
- Boone County, AR 11%
- Stone County, AR 10%
- Camden County, MO 9%
- Claiborne County, TN 9%
- Bollinger County, MO 8%
- DeKalb County, AL 8%
- McDonald County, MO 7%
- Washington County, AR 7%
- Bradley County, TN 7%
- Stone County, MO 6%
- Alexander County, IL 6%
- Baxter County, AR 5%
- Metcalfe County, KY 4%
- Newton County, AR 4%
- Cape Girardeau County, MO 4%
- Union County, IL 4%
Sources
Shares and properties: USDA NRCS SSURGO via Soil Data Access, weighted by each component's share of its map units. Description: the USDA NRCS series description. How we count.