Dallam County, Texas

Survey Area TX111• Texas

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Dallam County, Texas. 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
Dallam loamy fine sand, 0 to 3 percent slopes	171K	Well drained	B	Somewhat limited	Somewhat limited
Dallam fine sandy loam, 0 to 1 percent slopes	127K	Well drained	B	Not limited	Somewhat limited
Gruver loam, 0 to 1 percent slopes	80K	Well drained	C	Somewhat limited	Very limited
Conlen loam, 0 to 3 percent slopes	77K	Well drained	B	Not limited	Somewhat limited
Sunray loam, 0 to 1 percent slopes	65K	Well drained	B	Somewhat limited	Somewhat limited
Vingo and Dallam loamy fine sands, 0 to 8 percent slopes	53K	Well drained	A	Not limited	Somewhat limited
Sherm clay loam, 0 to 1 percent slopes	44K	Well drained	C	Somewhat limited	Very limited
Perico fine sandy loam, 0 to 1 percent slopes	42K	Well drained	B	Somewhat limited	Somewhat limited
Dumas loam, 0 to 1 percent slopes	36K	Well drained	B	Somewhat limited	Somewhat limited
Dallam fine sandy loam, 1 to 3 percent slopes	34K	Well drained	B	Not limited	Somewhat limited
Perico fine sandy loam, 1 to 3 percent slopes	31K	Well drained	B	Somewhat limited	Somewhat limited
Sunray loam, 1 to 3 percent slopes	31K	Well drained	B	Somewhat limited	Somewhat limited
Spurlock fine sandy loam, 0 to 3 percent slopes	21K	Well drained	B	Not limited	Somewhat limited
Texline loam, dry, 0 to 1 percent slopes	21K	Well drained	B	Somewhat limited	Somewhat limited
Rickmore fine sandy loam, 0 to 1 percent slopes	19K	Well drained	B	Somewhat limited	Somewhat limited
Plack loam, dry, 0 to 3 percent slopes	17K	Well drained	D	Very limited	Very limited
Kerrick-Plack loams, 0 to 1 percent slopes	11K	Well drained	C	Somewhat limited	Very limited
Spurlock soils, 1 to 8 percent slopes, hummocky	10K	Well drained	B	Not limited	Somewhat limited
Berthoud loam, 3 to 5 percent slopes	8K	Well drained	B	Somewhat limited	Somewhat limited
Dumas loam, 1 to 3 percent slopes	7K	Well drained	B	Somewhat limited	Somewhat 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.

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.

Vertisols

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

What This Means

Building & Foundations

Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.

Septic Systems

Most soils are reasonably suitable for conventional septic systems, though site-specific conditions always matter. Get a perc test to confirm.

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.