Greer County, Oklahoma

Survey Area OK055• 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 Inceptisols — young soils with minimal horizon development but more than Entisols. 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 Greer 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
Grandmore and Grandfield loamy sands, 0 to 3 percent slopes	24K	Moderately well drained	B	Somewhat limited	Very limited
Hollister silty clay loam, 0 to 1 percent slopes, moist	21K	Well drained	D	Very limited	Very limited
Knoco soils and Rock outcrop, 12 to 40 percent slopes	21K	Well drained	D	Very limited	Very limited
Westill clay loam, 1 to 3 percent slopes	17K	Well drained	D	Very limited	Very limited
Vernon-Knoco complex, cool, 1 to 12 percent slopes	13K	Well drained	D	Somewhat limited	Very limited
Cottonwood-Vinson-Rock outcrop complex, 1 to 8 percent slopes	13K	Well drained	D	Very limited	Very limited
Knoco-Badland complex, dry, 1 to 12 percent slopes	13K	Well drained	D	Very limited	Very limited
Spur clay loam, 0 to 1 percent slopes, occasionally flooded	12K	Well drained	B	Very limited	Very limited
Hardeman-Southside-Arnett complex, 3 to 20 percent slopes	11K	Well drained	A	Somewhat limited	Very limited
Springer and Devol loamy sands, 0 to 3 percent slopes	11K	Well drained	A	Not limited	Very limited
Roark loam, 0 to 1 percent slopes	10K	Well drained	C	Somewhat limited	Very limited
Beckman silty clay, 0 to 1 percent slopes, occasionally flooded	9K	Moderately well drained	D	Very limited	Very limited
Tipton loam, 0 to 1 percent slopes	8K	Well drained	B	Somewhat limited	Somewhat limited
Burford-Spikebox complex, 3 to 12 percent slopes	8K	Well drained	C	Somewhat limited	Very limited
Madge fine sandy loam, 1 to 3 percent slopes	7K	Well drained	B	Not limited	Very limited
Knoco, Rock outcrop, and Cottonwood soils, 2 to 20 percent slopes	7K	Well drained	D	Very limited	Very limited
Eda sand, 3 to 8 percent slopes	7K	Somewhat excessively drained	A	Not limited	Very limited
La Casa silty clay loam, 1 to 3 percent slopes	7K	Well drained	C	Somewhat limited	Very limited
Grandfield loamy sand, 0 to 3 percent slopes	7K	Well drained	B	Not limited	Very limited
Westola fine sandy loam, 0 to 1 percent slopes, occasionally flooded	6K	Well drained	A	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.

Inceptisols

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

Mollisols

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

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.

What This Means

Building & Foundations

About 51% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 96% 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.