Dewey County Soil Data
Dewey County, Oklahoma
Avg pH
6.8
Texture
Loamy fine sand
Drainage
Somewhat excessively drained
Organic Matter
1.0%
Hydrologic Group
A
Data Story
About Soil in Dewey County, Oklahoma
Sweet, Sandy Entisols in Dewey County
Dewey County soils belong to the Entisols order and have a pH of 6.76. This is slightly more alkaline than the national median of 6.5, suiting plants that prefer 'sweeter' soil conditions.
Loamy Fine Sand Dominates the Land
A loamy fine sand texture dominates with 52.2% sand, 28.4% silt, and 13.4% clay. This high sand content ensures the soil is easy to dig but may lose nutrients quickly through leaching.
Low Organic Matter and Water Storage
Organic matter is low at 1.04%, which is well below the state average of 1.72%. The available water capacity of 0.127 in/in also trails the state benchmark, making consistent irrigation critical for garden success.
Fast-Draining Soils for Great Infiltration
The soil is somewhat excessively drained and belongs to Hydrologic Group A, indicating very high infiltration rates. While these conditions are excellent for building, they require frequent watering for most traditional crops.
Drought-Tolerant Planting in Zone 7a
Hardiness Zone 7a allows for a variety of hardy grains and drought-tolerant native plants. While the soil score is lower at 31.1, the excellent drainage makes it a great spot for specialized xeriscaping.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group A — Low Runoff
Sandy, well-drained soils with high infiltration rates. Water moves quickly through the soil profile. Lowest runoff potential when thoroughly wetted.
Drainage Class
Somewhat excessively drained
Water is removed rapidly. Soils may be droughty and have limited water-holding capacity.
Soil Profile
Dominant texture: Loamy fine sand
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Dewey County have?
Dewey County's soil is classified as Loamy fine sand. This indicates the relative proportions of sand, silt, and clay — 52% sand, 28% silt, and 13% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Dewey County's soil acidic or alkaline?
Dewey County's soil has a pH of 6.8, which is near neutral. This range is ideal for most garden plants and field crops.
What is the drainage class for Dewey County?
Dewey County has a dominant drainage class of "Somewhat excessively drained." Moderate drainage allows adequate moisture retention while still permitting excess water to drain over time.
What crops or plants grow well in Dewey County's soil?
Based on Dewey County's Loamy fine sand texture, pH of 6.8, and Somewhat excessively drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Dewey County?
Dewey County's dominant soil order is Entisols. Entisols are recently formed soils with little to no horizon development. They are common on floodplains, steep slopes, and sandy deposits.
Planning your lawn? View lawn care data for Dewey County on LawnByCounty.com →
Other Counties in Oklahoma
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.