Soil series profile

Ragsdale soil series

Ragsdale is a poorly drained soil with a silty clay loam surface, mapped on 150,503 acres in 39 counties across 3 states. Hydrologic group B/D.

#2454 by mapped area fine-silty Typic Argiaquolls (Mollisols)

Drainage class
Poorly drained
98% of mapped acres
Hydrologic group
B/D
97% of mapped acres
Typical topsoil pH
6.7
neutral · range 6.5–6.7
Mapped area
151k
acres in 39 counties, 3 states

Typical Ragsdale profile

Texture and pH by depth

Typical Ragsdale soil profile by depth 0 in 20 in 40 in 60 in 0–13 in · Ap · pH 6.7 · 29% clay Silty clay loam 13–50 in · Bt · pH 6.7 · 27% clay Silty clay loam 50–79 in · C · pH 7.9 · 12% clay Silt loam
Depth to scale. More strongly shaded layers hold more clay. Horizon names are the soil survey's (A = topsoil, B = subsoil, C = parent material).
Show as a table
Typical Ragsdale horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–13 in (Ap) Silty clay loam 6.7 29% 10% 5.75%
13–50 in (Bt) Silty clay loam 6.7 27% 9% 1.25%
50–79 in (C) Silt loam 7.9 12% 11% 0.25%

Representative values from the most extensive Ragsdale map unit (Ragsdale silty clay loam, 0 to 2 percent slopes, survey area OH057). Other map units of this series vary within the series range.

Hands holding dark garden soil
Stock photo for illustration, not a sample of this soil series. Credit on the Sources & method page.

What this means

What Ragsdale soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Ragsdale soils is neutral: pH 6.7 (most land between 6.5 and 6.7), the range most vegetables, flowers and lawn grasses prefer.

Loamy topsoil (loam, silt loam and similar) covers 97% of mapped Ragsdale acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (58% of mapped Ragsdale acres).

98% of mapped Ragsdale acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.

For lawns and yards

On 97% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.

A seasonal high water table comes within 18 inches of the surface on 98% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.

For a septic system

For conventional septic absorption fields, NRCS rates 97% of the acres in mapped Ragsdale soils very limited, 0% somewhat limited and 0% not limited (3% not rated, such as urban land, pits or water).

Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.

Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.

Generated from the mapped numbers above using fixed rules, not a site visit. See how these notes are written.

Where Ragsdale soil is found

Mapped acres

Ragsdale is mapped in Indiana, Ohio and Illinois.

Counties with the most mapped Ragsdale soil
County Acres Share of county land
Greene County, OH 25,848 9.7%
Fountain County, IN 13,335 5.3%
Putnam County, IN 13,145 4.3%
Parke County, IN 11,753 4.3%
Vermillion County, IN 11,486 7.2%
Montgomery County, IN 10,687 3.3%
Vigo County, IN 10,099 4.0%
Sullivan County, IN 9,410 3.4%
Clinton County, IN 8,299 3.2%
Daviess County, IN 8,269 3.0%
Knox County, IN 6,795 2.1%
Posey County, IN 3,954 1.5%
Hendricks County, IN 3,652 1.4%
Butler County, OH 3,414 1.2%
Spencer County, IN 2,725 1.1%
Vanderburgh County, IN 2,058 1.4%
Wayne County, IN 1,102 0.4%
Clinton County, OH 1,045 0.4%
Gallatin County, IL 694 0.3%
Warren County, OH 689 0.3%
Gibson County, IN 353 0.1%
Vermilion County, IL 323 0.1%
Edgar County, IL 295 0.1%
Union County, IN 136 0.1%
Montgomery County, OH 117 0.0%
Saline County, IL 113 0.0%
Preble County, OH 108 0.0%
Warren County, IN 107 0.0%
Fayette County, IN 100 0.1%
Hamilton County, OH 98 0.0%
Edwards County, IL 85 0.1%
Cass County, IN 81 0.0%
Clay County, IN 43 0.0%
Pike County, IN 29 0.0%
Warrick County, IN 29 0.0%
McLean County, IL 14 0.0%
Greene County, IN 8 0.0%
Highland County, OH 5 0.0%
Howard County, IN 0 0.0%

Septic absorption fields

NRCS rating, share of Ragsdale acres

Not limited 0%
Somewhat limited 0%
Very limited 97%
Not rated 3%
Septic tank absorption field rating across mapped Ragsdale acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Ragsdale acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited97.4%
Not rated2.6%

Drainage, water table and flooding

Share of Ragsdale acres

Depth to seasonal high water table
About 2 inches (median where reported); within 18 inches on 98% of acres.
Flooding
Not mapped as flooding on most acres.
Slope
Typically 0–0% (median 0%).
Topsoil organic matter
Median 4%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained 0%
Poorly drained 98%
Very poorly drained <1%
Not rated 2%
Drainage class across mapped Ragsdale acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Ragsdale acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained0.0%
Poorly drained98.2%
Very poorly drained0.1%
Not rated1.6%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration 0%
D: very slow infiltration (clayey, shallow or wet) 0%
A/D: D as is, A if drained 0%
B/D: D as is, B if drained 97%
C/D: D as is, C if drained 0%
Not rated 3%
Hydrologic soil group across mapped Ragsdale acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Ragsdale acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration0.0%
D: very slow infiltration (clayey, shallow or wet)0.0%
A/D: D as is, A if drained0.0%
B/D: D as is, B if drained97.4%
C/D: D as is, C if drained0.0%
Not rated2.6%

Sources & data dates

Source
USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
Data date
SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
Scope
All map unit components named Ragsdale (component kind "Series") in SSURGO: 150,503 acres.
Method
Shares are by mapped acres of Ragsdale components. The profile comes from the single largest Ragsdale component. Full methodology.

Independent reference site. No government affiliation or endorsement.

Full narrative description: USDA Official Soil Series Description for Ragsdale.