HomeSoil seriesMarshall
Marshall soil series
Marshall soils cover 1,213,978 mapped acres, mostly in Iowa, Missouri and Nebraska. USDA rates shrink-swell a limit for houses without basements on 14% of that land, and a shallow water table a limit for basements on 0%.
It is the leading soil series by area in 9 of the counties and cities on this site, including Audubon County, IA; Montgomery County, IA; Fremont County, IA.
SSURGO survey versions to August 5, 2026 · series description revised 2014-08
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 Marshall series consists of very deep, well drained soils formed in loess. These soils are on interfluves and hill slopes on uplands and on risers and treads on stream terraces. Slope ranges from 0 to 25 percent. Mean annual air temperature is about 11 degrees C. Mean annual precipitation is about 765 millimeters.
Source: USDA NRCS series description (OSD) for Marshall, revised 2014-08. Read it.
Engineering properties
| Mapped area (SSURGO) | 1,213,978 acres |
| Shrink-swell limits houses without basements | 14.2% |
| Shallow water table limits basements | 0.0% |
| Very limited for septic absorption fields | 93.9% |
| Most common drainage class | Well drained |
| Most common hydrologic soil group | C |
| Taxonomic class | Fine-silty, mixed, superactive, mesic Typic Hapludolls |
| Type location | Major Land Resource Area (MLRA) 107B-Iowa and Missouri Deep Loess Hills, Cass County, Iowa subset |
Where Marshall is mapped
| State | Mapped acres |
|---|---|
| Iowa | 743,896 |
| Missouri | 244,524 |
| Nebraska | 179,079 |
| Kansas | 46,478 |
Places where Marshall leads
Counties and cities where Marshall covers more mapped land than any other series.
| Place | Share of mapped land |
|---|---|
| Audubon County, IA | 36% |
| Montgomery County, IA | 27% |
| Fremont County, IA | 22% |
| Carroll County, IA | 20% |
| Lafayette County, MO | 20% |
| Cass County, IA | 18% |
| Mills County, IA | 17% |
| Atchison County, MO | 17% |
| Holt County, MO | 10% |
Other places where Marshall is a main soil
Counties and cities where Marshall 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.