Johnson County, Arkansas

Survey Area AR071• Arkansas

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Johnson County, Arkansas. 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
Nella-Enders complex, 20 to 40 percent slopes	54K	Well drained	D	Very limited	Very limited
Nella-Mountainburg association, very steep	48K	Well drained	B	Very limited	Very limited
Linker fine sandy loam, 3 to 8 percent slopes	46K	Well drained	C	Very limited	Very limited
Nella-Mountainburg association, steep	29K	Well drained	B	Very limited	Very limited
Mountainburg gravelly fine sandy loam, 3 to 12 percent slopes	26K	Well drained	D	Very limited	Very limited
Nella-Enders complex, 8 to 20 percent slopes	16K	Well drained	D	Somewhat limited	Very limited
Nella-Mountainburg association, rolling	16K	Well drained	B	Somewhat limited	Somewhat limited
Mountainburg stony fine sandy loam, 1 to 12 percent slopes, rocky	15K	Well drained	D	Very limited	Very limited
Water	15K		D	Not rated	Not rated
Spadra fine sandy loam, 1 to 3 percent slopes	14K	Well drained	B	Not limited	Somewhat limited
Linker-Mountainburg association, rolling	13K	Well drained	C	Very limited	Very limited
Leadvale silt loam, 1 to 3 percent slopes	12K	Moderately well drained	C/D	Very limited	Very limited
Nella-Enders association, very steep	11K	Well drained	B	Very limited	Very limited
Pickwick silt loam, 3 to 8 percent slopes	10K	Well drained	B	Not limited	Somewhat limited
Cane fine sandy loam, 3 to 8 percent slopes	8K	Moderately well drained	C	Very limited	Very limited
Leesburg-Enders association, very steep	8K	Well drained	B	Very limited	Very limited
Mountainburg stony fine sandy loam, 12 to 40 percent slopes, rocky	6K	Well drained	D	Very limited	Very limited
Pickwick silt loam, 1 to 3 percent slopes	6K	Well drained	B	Not limited	Somewhat limited
Nella gravelly fine sandy loam, 3 to 8 percent slopes	6K	Well drained	B	Not limited	Somewhat limited
Ceda cobbly fine sandy loam, 0 to 3 percent slopes, frequently 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.

Ultisols

Strongly weathered clay soils of the Southeast. Acidic and naturally low in nutrients. Clay subsoil can slow drainage.

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.

Entisols

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

What This Means

Building & Foundations

About 77% 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 81% 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

Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.