Bryan County Soil Data
Bryan County, Oklahoma
USDA SSURGO / PHZMAvg pH
6.2
Texture
Water
Drainage
N/A
Organic Matter
1.5%
Hydrologic Group
D
Data Story
About Soil in Bryan County, Oklahoma
Southern Oklahoma's Acidic Base
Bryan County has a slightly acidic soil with a pH of 6.15, which aligns closely with the Oklahoma average of 6.06. This is more acidic than the national 6.5 median but healthy for many crops.
High Clay and Nutrients
This soil has a higher clay content than most neighboring counties at 22.5%, paired with 40.9% sand. This mix provides better nutrient storage and structural stability than sandier soils in the west.
Superior Water Storage Capacity
The available water capacity is a strong 0.146 in/in, exceeding the state average of 0.144 in/in. Organic matter measures 1.50%, which is respectable for the region though below the national 2.0% average.
Slower Moisture Movement Patterns
The county falls into Hydrologic Group D, suggesting that higher clay content might slow water movement. Gardeners should watch for slow-drying spots after heavy rains which can stress root systems.
Pecans and Peaches Thrive Here
Zone 8a allows for an exceptionally long growing season that suits peaches and pecans. The soil's superior water capacity makes it resilient during dry Oklahoma summers.
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
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Bryan County have?
Bryan County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 41% sand, 31% silt, and 23% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Bryan County's soil acidic or alkaline?
Bryan County's soil has a pH of 6.2, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Bryan County?
Drainage class data is not currently available for Bryan County.
What crops or plants grow well in Bryan County's soil?
Based on Bryan County's Water texture, pH of 6.2, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Bryan County?
The dominant USDA soil order for Bryan County is not currently available in our dataset.
Soil & Planting Advisory: Bryan County
Soil Verdict
Bryan County is in USDA hardiness zone 8a, a warm climate zone. where winter lows can reach 10°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture.
Regional Context
Bryan County is somewhat warmer than the Oklahoma statewide average.
Planning your lawn? View lawn care data for Bryan 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.