Dawson County Soil Data
Dawson County, Texas
Avg pH
7.7
Texture
Sandy Loam
Drainage
N/A
Organic Matter
1.4%
Hydrologic Group
D
Data Story
About Soil in Dawson County, Texas
Alkaline sands of the South Plains
Dawson County soils are notably alkaline with an average pH of 7.74, significantly higher than the national median of 6.5. This high pH level reflects the semi-arid environment and the specific mineral makeup of the region.
Sandy soil dominates the landscape
The soil is comprised of 56.9% sand, with silt at 22.5% and clay at 19.6%. This high sand content makes the soil easy to work but requires careful management to prevent erosion and nutrient leaching.
Lower organic matter in a dry climate
Organic matter averages 1.39%, falling below the state average of 1.66% and the national 2.0% benchmark. Despite the low organic content, the available water capacity of 0.131 in/in remains close to the state average of 0.133 in/in.
Limited drainage in hydrologic group D
While sand usually drains well, this soil is categorized in hydrologic group D, suggesting it has a very slow infiltration rate when thoroughly wet. Local growers must monitor for surface runoff during the occasional heavy West Texas rains.
Heat-loving crops thrive in Zone 8a
In Zone 8a, Dawson County is famous for cotton, which thrives in these sandy, alkaline conditions. Home gardeners should focus on drought-resistant varieties and consider adding compost to boost the relatively low organic matter levels.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group D — High Runoff
Clay soils with very slow infiltration rates. Highest runoff potential. These soils have a permanent high water table or are shallow over impervious material.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Sandy Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Dawson County have?
Dawson County's soil is classified as Sandy Loam. This indicates the relative proportions of sand, silt, and clay — 57% sand, 22% silt, and 20% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Dawson County's soil acidic or alkaline?
Dawson County's soil has a pH of 7.7, which is mildly to moderately alkaline. Sulfur amendments can lower pH if needed.
What is the drainage class for Dawson County?
Drainage class data is not currently available for Dawson County.
What crops or plants grow well in Dawson County's soil?
Based on Dawson County's Sandy Loam texture, pH of 7.7, and drainage class, the soil is well suited for drought-tolerant crops and native grasses, row crops and vegetable gardens.
What USDA soil order is found in Dawson County?
The dominant USDA soil order for Dawson County is not currently available in our dataset.
Planning your lawn? View lawn care data for Dawson County on LawnByCounty.com →
Other Counties in Texas
Soil data sourced from USDA SSURGO via Soil Data Access. Data is informational only and should not be used as a substitute for on-site soil testing. Contact your local NRCS office for site-specific soil information.