Noble County Soil Data
Noble County, Oklahoma
USDA SSURGO / PHZMAvg pH
6.0
Texture
Variable
Drainage
N/A
Organic Matter
1.6%
Hydrologic Group
D
Data Story
About Soil in Noble County, Oklahoma
Noble County’s Balanced Soil pH
Noble County maintains an average soil pH of 6.02, which closely aligns with the Oklahoma state average. This level is slightly acidic but remains within the ideal range for most forage and cereal crops. With a soil score of 43.0, it ranks as one of the better agricultural foundations in the region.
A Complex and Silt-Heavy Profile
The county features a high silt concentration of 41.0%, combined with 31.4% sand and 18.9% clay. This mix provides a stable structure that resists compaction better than pure clay while holding more water than sand. The variable texture makes it adaptable for both grazing land and row crops.
Top-Tier Water Holding Potential
Noble County boasts an impressive available water capacity of 0.161 in/in, well above the state average of 0.144 in/in. Organic matter levels of 1.59% support a healthy ecosystem for beneficial soil microbes. This high water capacity makes the county particularly resilient during the state's frequent dry periods.
Slow Infiltration and Water Management
The soil is classified in hydrologic group D, which indicates a very slow infiltration rate and high runoff potential. Because water doesn't soak in quickly, land management must focus on preventing surface ponding and erosion. Careful site planning is essential for any new construction or intensive farming operations.
Diverse Options in Zone 7a
The 7a hardiness zone supports a wide variety of cool-season crops like winter wheat and hardy greens. Noble County's high water capacity also makes it a great spot for native prairie restoration and robust pastures. It’s a fantastic environment for anyone looking to establish a resilient, water-wise homestead.
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: Variable
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 Noble County have?
Noble County's soil is classified as Variable. This indicates the relative proportions of sand, silt, and clay — 31% sand, 41% silt, and 19% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Noble County's soil acidic or alkaline?
Noble County's soil has a pH of 6.0, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Noble County?
Drainage class data is not currently available for Noble County.
What crops or plants grow well in Noble County's soil?
Based on Noble County's Variable texture, pH of 6.0, and drainage class, the soil is well suited for vegetables, grains, and most field crops.
What USDA soil order is found in Noble County?
The dominant USDA soil order for Noble County is not currently available in our dataset.
Soil & Planting Advisory: Noble County
Soil Verdict
Noble County is in USDA hardiness zone 7a, a moderate climate zone. where winter lows can reach 0°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. Winter protection (mulch, burlap wraps) helps push the zone boundary for desired species. 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. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Noble County closely matches the Oklahoma average hardiness conditions.
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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.