Logan County Soil Data
Logan County, Arkansas
Avg pH
5.6
Texture
Loam
Drainage
N/A
Organic Matter
1.9%
Hydrologic Group
D
Data Story
About Soil in Logan County, Arkansas
Acidic Soils Typical of the Region
Logan County soils are moderately acidic with an average pH of 5.63, sitting slightly above the Arkansas average of 5.56. This level remains significantly lower than the national median of 6.5, suggesting a need for lime in many gardens.
A Silt-Dominant Mineral Profile
The soil profile consists of 39.0% sand, 45.3% silt, and 15.7% clay. This balanced mix generally offers decent workability, though the high silt content requires careful management to prevent surface crusting after rains.
Opportunities to Build Organic Wealth
Organic matter levels are 1.92%, which is just under the national average of 2.0% and well below the state average of 4.15%. The available water capacity of 0.138 in/in also trails the state benchmark of 0.148, making supplemental irrigation important.
Managing High Runoff Potential
Classified in Hydrologic Group D, these soils often have high runoff potential and slower infiltration rates. This characteristic makes them challenging for sites requiring quick drainage but excellent for holding water in pond applications.
Thriving in the Heart of Zone 8a
Located in USDA Hardiness Zone 8a, Logan County is ideal for growing blueberries and pecans. The mild climate and unique soil chemistry invite you to transform your local landscape into a productive and beautiful garden.
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: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Logan County have?
Logan County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 39% sand, 45% silt, and 16% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Logan County's soil acidic or alkaline?
Logan County's soil has a pH of 5.6, 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 Loam texture, pH of 5.6, and drainage class, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Logan County?
The dominant USDA soil order for Logan County is not currently available in our dataset.
Planning your lawn? View lawn care data for Logan County on LawnByCounty.com →
Other Counties in Arkansas
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.