Smith County, Mississippi

Survey Area MS129• Mississippi

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 Smith County, Mississippi. 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
Smithdale fine sandy loam, 15 to 35 percent slopes	47K	Well drained	B	Very limited	Very limited
Savannah fine sandy loam, 2 to 5 percent slopes	42K	Moderately well drained	C	Very limited	Very limited
Smithdale fine sandy loam, 8 to 15 percent slopes	38K	Well drained	B	Somewhat limited	Very limited
Ruston fine sandy loam, 5 to 8 percent slopes	27K	Well drained	B	Not limited	Somewhat limited
Stough fine sandy loam, 0 to 2 percent slopes, occasionally flooded	25K	Somewhat poorly drained	C/D	Very limited	Very limited
Ruston fine sandy loam, 2 to 5 percent slopes	25K	Well drained	B	Not limited	Somewhat limited
Savannah fine sandy loam, 5 to 8 percent slopes	24K	Moderately well drained	C	Very limited	Very limited
Sweatman fine sandy loam, 8 to 15 percent slopes	21K	Well drained	C	Somewhat limited	Very limited
Trebloc silt loam, 0 to 2 percent slopes, frequently flooded	14K	Poorly drained	C/D	Very limited	Very limited
Quitman fine sandy loam, 0 to 2 percent slopes, occasionally flooded	13K	Somewhat poorly drained	C/D	Very limited	Very limited
Heidel sandy loam, 15 to 35 percent slopes	13K	Well drained	B	Very limited	Very limited
Ora fine sandy loam, 2 to 5 percent slopes	12K	Moderately well drained	C/D	Very limited	Very limited
Kirkville fine sandy loam, 0 to 2 percent slopes, occasionally flooded	11K	Moderately well drained	C	Very limited	Very limited
Jena fine sandy loam, 0 to 2 percent slopes, occasionally flooded	10K	Well drained	B	Very limited	Very limited
Sweatman fine sandy loam, 15 to 35 percent slopes	8K	Well drained	C	Very limited	Very limited
Urbo clay loam, occasionally flooded	8K	Somewhat poorly drained	D	Very limited	Very limited
Bibb fine sandy loam, 0 to 2 percent slopes, frequently flooded	8K	Poorly drained	B/D	Very limited	Very limited
Sweatman fine sandy loam, 5 to 8 percent slopes	7K	Well drained	C	Somewhat limited	Very limited
Boswell loam, 5 to 8 percent slopes, eroded	6K	Moderately well drained	D	Very limited	Very limited
Ichusa silty clay loam, 2 to 5 percent slopes	6K	Somewhat poorly 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.

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.

Vertisols

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

Inceptisols

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

Entisols

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

What This Means

Building & Foundations

About 67% 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 85% 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.