HomeSoil seriesSharpsburg
Sharpsburg soil series
Sharpsburg soils cover 1,043,745 mapped acres, mostly in Iowa, Missouri and Kansas. USDA rates shrink-swell a limit for houses without basements on 98% of that land, and a shallow water table a limit for basements on 93%.
It is the leading soil series by area in 8 of the counties and cities on this site, including Adair County, IA; Clay County, MO; Madison County, IA.
SSURGO survey versions to August 5, 2026 · series description revised 2020-11
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 Sharpsburg series consists of very deep, moderately well drained soils formed in loess. These soils are on interfluves and hill slopes on uplands and on treads and risers on stream terraces in river valleys. Slope ranges from 0 to 18 percent. Mean annual air temperature is about 13 degrees C (55 degrees F). Mean annual precipitation is about 900 millimeters (35 inches).
Source: USDA NRCS series description (OSD) for Sharpsburg, revised 2020-11. Read it.
Engineering properties
| Mapped area (SSURGO) | 1,043,745 acres |
| Shrink-swell limits houses without basements | 98.3% |
| Shallow water table limits basements | 93.2% |
| Very limited for septic absorption fields | 100.0% |
| Most common drainage class | Moderately well drained |
| Most common hydrologic soil group | C |
| Taxonomic class | Fine, smectitic, mesic Typic Argiudolls |
| Type location | Land Resource Unit (LRU) 108D-Illinois and Iowa Deep Loess and Drift, Western Part |
Where Sharpsburg is mapped
| State | Mapped acres |
|---|---|
| Iowa | 606,808 |
| Missouri | 363,754 |
| Kansas | 72,965 |
| Nebraska | 219 |
Places where Sharpsburg leads
Counties and cities where Sharpsburg covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| Adair County, IA | 24% |
| Clay County, MO | 22% |
| Madison County, IA | 21% |
| Page County, IA | 21% |
| Adams County, IA | 20% |
| Guthrie County, IA | 19% |
| Union County, IA | 15% |
| Warren County, IA | 12% |
Other places where Sharpsburg is a main soil
Counties and cities where Sharpsburg is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.
Counties
- Nodaway County, MO 20%
- Taylor County, IA 11%
- Cass County, IA 11%
- Clinton County, MO 9%
- Platte County, MO 9%
- Marion County, IA 8%
- Wyandotte County, KS 8%
- Worth County, MO 7%
- Atchison County, KS 7%
- Jackson County, MO 7%
- Ray County, MO 6%
- Leavenworth County, KS 6%
- Johnson County, KS 6%
- Dallas County, IA 4%
- DeKalb County, MO 3%
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.