Logan County Soil Data
Logan County, Oklahoma
USDA SSURGO / PHZMAvg pH
6.0
Texture
Water
Drainage
N/A
Organic Matter
1.5%
Hydrologic Group
D
Data Story
About Soil in Logan County, Oklahoma
Acidic Profiles in Logan County
Logan County features an average soil pH of 6.02, which is more acidic than the national median of 6.5. While taxonomic data is limited for this region, the pH closely mirrors the Oklahoma state average of 6.06. This acidity level is generally favorable for many regional forage crops and native timber.
Sand-Driven Soil Texture
The soil is comprised of 45.7% sand and 16.1% clay, leaning toward a lighter, more permeable mix than some neighbors. With 29.6% silt, the soil offers a moderate level of workability for local farmers. The sand-heavy profile allows for easier root penetration compared to denser clay soils.
Reliable Water Access
The county's organic matter stands at 1.48%, trailing the state average of 1.72%. Despite lower organic content, the available water capacity of 0.144 in/in perfectly matches the Oklahoma state average. This balance provides a steady baseline for agricultural productivity and plant health.
High Runoff Potential
Logan County falls into Hydrologic Group D, indicating a high potential for water runoff when the soil is saturated. Although specific drainage class data is limited, the Group D designation suggests that water moves slowly through the lower soil layers. Proper surface grading is essential for preventing erosion on sloped land.
Thriving in Hardiness Zone 7b
Hardiness zone 7b allows for a long growing season that supports everything from winter wheat to summer melons. The sandy texture is particularly well-suited for root vegetables and native shrubs. It is a great environment to establish a resilient home garden or small orchard.
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 Logan County have?
Logan County's soil is classified as Water. This indicates the relative proportions of sand, silt, and clay — 46% sand, 30% silt, and 16% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Logan County's soil acidic or alkaline?
Logan 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 Logan County?
Drainage class data is not currently available for Logan County.
What crops or plants grow well in Logan County's soil?
Based on Logan County's Water 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 Logan County?
The dominant USDA soil order for Logan County is not currently available in our dataset.
Soil & Planting Advisory: Logan County
Soil Verdict
Logan County is in USDA hardiness zone 7b, a moderate climate zone. where winter lows can reach 5°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
Logan County closely matches the Oklahoma average hardiness conditions. The zone range of 7a-7b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Logan 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.