HomeSoil seriesClarno
Clarno soil series
Clarno soils cover 913,716 mapped acres, almost all of them in South Dakota. USDA rates shrink-swell a limit for houses without basements on 0% of that land, and a shallow water table a limit for basements on 0%.
It is the leading soil series by area in 7 of the counties and cities on this site, including McCook County, SD; Hanson County, SD; Hutchinson County, SD.
SSURGO survey versions to August 5, 2026 · series description revised 2009-03
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 Clarno series consists of very deep, well drained or moderately well drained soils formed in glacial till on uplands. Permeability is moderately slow. Slopes range from 0 to 25 percent. Mean annual precipitation is about 22 inches, and mean annual temperature is about 47 degrees F.
Source: USDA NRCS series description (OSD) for Clarno, revised 2009-03. Read it.
Engineering properties
| Mapped area (SSURGO) | 913,716 acres |
| Shrink-swell limits houses without basements | 0.0% |
| Shallow water table limits basements | 0.0% |
| Very limited for septic absorption fields | 99.9% |
| Most common drainage class | Well drained |
| Most common hydrologic soil group | B |
| Taxonomic class | Fine-loamy, mixed, superactive, mesic Typic Haplustolls |
| Type location | Davison County, South Dakota |
Where Clarno is mapped
| State | Mapped acres |
|---|---|
| South Dakota | 910,019 |
| Nebraska | 3,696 |
Places where Clarno leads
Counties and cities where Clarno covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| McCook County, SD | 31% |
| Hanson County, SD | 30% |
| Hutchinson County, SD | 30% |
| Miner County, SD | 25% |
| Yankton County, SD | 21% |
| Bon Homme County, SD | 18% |
| Sanborn County, SD | 18% |
Other places where Clarno is a main soil
Counties and cities where Clarno is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.
Counties
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.