Tillman County, Oklahoma

Survey Area OK141• Oklahoma

The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Tillman County, Oklahoma. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Tillman and Foard soils, 1 to 3 percent slopes	45K	Well drained	C	Very limited	Very limited
Vernon-Knoco complex, 3 to 12 percent slopes	35K	Well drained	D	Very limited	Very limited
Tipton loam, 0 to 1 percent slopes	34K	Well drained	B	Somewhat limited	Somewhat limited
Tillman-Hinkle complex, 1 to 3 percent slopes	30K	Well drained	C	Very limited	Very limited
Lincoln and Gracemore soils, 0 to 1 percent slopes, frequently flooded	28K	Somewhat excessively drained	A	Very limited	Very limited
Tipton fine sandy loam, 0 to 1 percent slopes	28K	Well drained	B	Somewhat limited	Very limited
Foard-Hinkle complex, 0 to 1 percent slopes	28K	Well drained	D	Very limited	Not limited
Hollister silt loam, 0 to 1 percent slopes	24K	Well drained	C	Very limited	Very limited
Foard silt loam, 0 to 1 percent slopes	23K	Well drained	D	Very limited	Not limited
Clairemont silty clay loam, 0 to 1 percent slopes, channeled, frequently flooded	20K	Well drained	B	Very limited	Very limited
Indiahoma silty clay loam, 1 to 3 percent slopes	18K	Well drained	D	Very limited	Very limited
Devol fine sandy loam, 0 to 1 percent slopes	15K	Well drained	A	Not limited	Very limited
Abilene loam, 0 to 1 percent slopes	14K	Well drained	C	Somewhat limited	Very limited
Grandfield-Grandmore complex, 0 to 3 percent slopes	14K	Well drained	B	Not limited	Very limited
Water	13K		D	Not rated	Not rated
Jester loamy fine sand, 3 to 8 percent slopes	12K	Excessively drained	A	Not limited	Very limited
Grandfield and Farry soils, 1 to 3 percent slopes	12K	Well drained	B	Not limited	Very limited
Devol loamy sand, 0 to 3 percent slopes	12K	Well drained	A	Not limited	Very limited
Vernon clay, 3 to 5 percent slopes, eroded	11K	Well drained	D	Very limited	Very limited
Wheatwood silt loam, 0 to 1 percent slopes, occasionally flooded	11K	Well drained	B	Very limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

Vertisols

High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.

What This Means

Building & Foundations

About 63% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 77% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.