Randolph County, Arkansas

Survey Area AR121• Arkansas

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 Randolph 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
Gepp very gravelly silt loam, 8 to 12 percent slopes	56K	Well drained	D	Somewhat limited	Very limited
Captina silt loam, 3 to 8 percent slopes	43K	Moderately well drained	C/D	Very limited	Very limited
Gepp-Doniphan association, rolling	31K	Well drained	D	Very limited	Very limited
Amagon silt loam	19K	Poorly drained	C/D	Very limited	Very limited
Gepp-Ventris association, rolling	18K	Well drained	D	Very limited	Very limited
Ashton silt loam, 0 to 1 percent slopes, occasionally flooded	18K	Well drained	B	Very limited	Very limited
Bosket fine sandy loam, 0 to 3 percent slopes	17K	Well drained	B	Not limited	Very limited
Hontas silt loam, 0 to 1 percent slopes, frequently flooded	14K	Moderately well drained	C	Very limited	Very limited
Peridge silt loam, 3 to 8 percent slopes	13K	Well drained	B	Somewhat limited	Somewhat limited
Ventris-Rock outcrop complex, 3 to 12 percent slopes	13K	Moderately well drained	D	Very limited	Very limited
Doniphan-Gepp association, undulating	13K	Well drained	B	Not limited	Somewhat limited
Kobel silty clay loam	13K	Poorly drained	D	Very limited	Very limited
Dundee silt loam, 0 to 1 percent slopes	13K	Somewhat poorly drained	C	Very limited	Very limited
Gepp very gravelly silt loam, 12 to 20 percent slopes	12K	Well drained	D	Very limited	Very limited
Doniphan gravelly silt loam, 8 to 12 percent slopes	12K	Well drained	C	Somewhat limited	Very limited
McCrory fine sandy loam, 0 to 1 percent slopes	11K	Poorly drained	C/D	Very limited	Very limited
Razort silt loam, 0 to 3 percent slopes, frequently flooded	10K	Well drained	B	Very limited	Very limited
Brocket gravelly fine sandy loam, 8 to 12 percent slopes	10K	Well drained	B	Somewhat limited	Somewhat limited
Loring silt loam, 8 to 12 percent slopes, west	10K	Moderately well drained	C/D	Very limited	Very limited
Gepp-Ventris association, steep	10K	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.

Ultisols

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

Inceptisols

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

What This Means

Building & Foundations

About 65% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 89% 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.