Alleghany County Soil Data
Alleghany County, North Carolina
Avg pH
5.0
Texture
Fine sandy loam
Drainage
Somewhat excessively drained
Organic Matter
3.8%
Hydrologic Group
B
Data Story
About Soil in Alleghany County, North Carolina
Mountain Inceptisols and Acidic Profiles
Alleghany County features Inceptisols with an average pH of 5.02, making it significantly more acidic than the national 6.5 median. These relatively young soils are still developing and reflect the rugged terrain of the Blue Ridge. The soil is even more acidic than the North Carolina state average of 5.14.
Fine Sandy Loam Texture
The soil is classified as a fine sandy loam, composed of 45.6% sand, 36.1% silt, and 14.2% clay. This mix provides excellent workability and is prized for its balanced physical properties. It allows for quick drainage while maintaining enough silt to prevent instant drying.
Rich Organic Matter for Higher Altitudes
Organic matter is impressive at 3.84%, nearly doubling the national average of 2.0%. The available water capacity of 0.141 in/in also exceeds the state average of 0.134. These metrics point to a highly fertile foundation that naturally supports robust plant growth.
Excessive Drainage and Sloped Terrain
The dominant drainage class is 'somewhat excessively drained,' belonging to hydrologic group B. This means water moves through the profile quickly, reducing the risk of root rot but increasing the need for irrigation during dry spells. It is an ideal setup for crops that dislike 'wet feet' but require careful erosion management on slopes.
Cool Weather Success in Zone 7a
The cooler Zone 7a climate and well-drained loams are perfect for Fraser firs and specialty mountain produce. Christmas tree farming is a natural fit for this soil-climate combination. Start your mountain garden today and take advantage of that rich organic matter.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group B — Moderate Runoff
Moderately deep, moderately well-drained soils with moderate infiltration rates. Good balance of drainage and water retention.
Drainage Class
Somewhat excessively drained
Water is removed rapidly. Soils may be droughty and have limited water-holding capacity.
Soil Profile
Dominant texture: Fine sandy loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Alleghany County have?
Alleghany County's soil is classified as Fine sandy loam. This indicates the relative proportions of sand, silt, and clay — 46% sand, 36% silt, and 14% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Alleghany County's soil acidic or alkaline?
Alleghany County's soil has a low pH of 5.0, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Alleghany County?
Alleghany County has a dominant drainage class of "Somewhat excessively drained." Moderate drainage allows adequate moisture retention while still permitting excess water to drain over time.
What crops or plants grow well in Alleghany County's soil?
Based on Alleghany County's Fine sandy loam texture, pH of 5.0, and Somewhat excessively drained, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens.
What USDA soil order is found in Alleghany County?
Alleghany County's dominant soil order is Inceptisols. Inceptisols are young soils with weak horizon development. They occur in a wide range of climates and parent materials.
Planning your lawn? View lawn care data for Alleghany County on LawnByCounty.com →
Other Counties in North Carolina
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.