Johnston County, Oklahoma

Survey Area OK069• 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 Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 Johnston 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
Kiti-Rock outcrop complex, 1 to 25 percent slopes	46K	Well drained	D	Very limited	Very limited
Claremore-Rock outcrop complex, 1 to 5 percent slopes	34K	Well drained	D	Very limited	Very limited
Chigley-Rock outcrop complex, 1 to 8 percent slopes	29K	Moderately well drained	C	Somewhat limited	Very limited
Chigley gravelly sandy loam, 1 to 3 percent slopes	24K	Moderately well drained	C	Somewhat limited	Very limited
Gasil fine sandy loam, cool, 1 to 5 percent slopes, eroded	23K	Well drained	B	Not limited	Somewhat limited
Agan silt loam, 0 to 2 percent slopes	21K	Moderately well drained	D	Very limited	Very limited
Verdigris silty clay loam, 0 to 1 percent slopes, occasionally flooded	17K	Well drained	B	Very limited	Very limited
Lula loam, 1 to 3 percent slopes	17K	Well drained	B	Somewhat limited	Somewhat limited
Gasil fine sandy loam, 3 to 5 percent slopes, severely eroded	14K	Well drained	B	Not limited	Somewhat limited
Gasil fine sandy loam, cool, 3 to 5 percent slopes	13K	Well drained	B	Not limited	Somewhat limited
Gasil fine sandy loam, cool, 1 to 3 percent slopes	12K	Well drained	B	Not limited	Somewhat limited
Burleson clay, 1 to 3 percent slopes	12K	Moderately well drained	D	Very limited	Very limited
Gasil fine sandy loam, 8 to 12 percent slopes	12K	Well drained	B	Somewhat limited	Somewhat limited
Durant loam, 1 to 3 percent slopes	12K	Moderately well drained	D	Very limited	Very limited
Scullin-Kiti complex, 2 to 6 percent slopes	11K	Well drained	C	Very limited	Very limited
Water	9K		D	Not rated	Not rated
Tribbey fine sandy loam, 0 to 2 percent slopes, frequently flooded	9K	Somewhat poorly drained	B	Very limited	Very limited
Stephenville fine sandy loam, 3 to 5 percent slopes	9K	Well drained	C	Somewhat limited	Very limited
Claremore-Lula complex, 3 to 5 percent slopes	7K	Well drained	D	Very limited	Very limited
Wilson silt loam, 0 to 1 percent slopes	7K	Moderately well drained	D	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.

Alfisols

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

Mollisols

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

Vertisols

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

What This Means

Building & Foundations

About 52% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 70% 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.