Sequoyah County Soil Data
Sequoyah County, Oklahoma
Avg pH
5.5
Texture
Water
Drainage
N/A
Organic Matter
1.5%
Hydrologic Group
D
Data Story
About Soil in Sequoyah County, Oklahoma
Acidic Foundations in Sequoyah County
Sequoyah County soil averages a pH of 5.50, marking it as significantly more acidic than the 6.5 national median. This level is also lower than the Oklahoma state average of 6.06. Such acidity often requires agricultural lime to support the growth of traditional forage and row crops.
A Silty Mix with Solid Structure
The composition features 40.5% silt and 30.3% sand, rounded out by 18.6% clay. This silty-sand balance offers a good compromise between drainage speed and nutrient retention. The moderate clay content helps the soil hold its shape and support plant root systems effectively.
Superior Water Retention for Growers
The available water capacity of 0.151 in/in is higher than the Oklahoma average of 0.144 in/in. While organic matter at 1.50% is slightly below the state average, the high water capacity provides a buffer against heat. This profile supports a soil score of 30.0, indicating fair productivity.
Runoff Risks in Hydrologic Group D
Like many neighboring areas, Sequoyah County is categorized in Hydrologic Group D. This indicates that the soil has a high runoff potential and may struggle to absorb water during intense downpours. Proper landscape grading is vital for residential builders to protect foundations from moisture.
Long Seasons in USDA Zone 7b
The warm climate of Zone 7b allows for a diverse range of crops, from summer melons to winter brassicas. Because the soil is acidic and silt-heavy, it is particularly well-suited for berries and native timber. Digging in organic amendments will further enhance the 1.50% organic matter base.
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: Water
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Sequoyah County have?
Sequoyah County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 30% sand, 41% silt, and 19% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Sequoyah County's soil acidic or alkaline?
Sequoyah County's soil has a pH of 5.5, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Sequoyah County?
Drainage class data is not currently available for Sequoyah County.
What crops or plants grow well in Sequoyah County's soil?
Based on Sequoyah County's Water texture, pH of 5.5, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Sequoyah County?
The dominant USDA soil order for Sequoyah County is not currently available in our dataset.
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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.