Randolph County Soil Data
Randolph County, Missouri
Avg pH
6.1
Texture
Silt loam
Drainage
Somewhat poorly drained
Organic Matter
2.3%
Hydrologic Group
C
Data Story
About Soil in Randolph County, Missouri
Reliable Silt Loam Alfisols in Randolph
Randolph County is characterized by Alfisols with a silt loam texture and an average pH of 6.13. This pH sits just above the state average of 6.09 but slightly below the national median of 6.5. These soils are naturally fertile and have supported Missouri agriculture for generations.
Fine-Textured Soils for Nutrient Storage
The soil is 62.7% silt and 22.2% clay, creating a fine-textured ground capable of holding significant mineral nutrients. A sand content of 14.5% helps prevent the silt from compacting too tightly during wet weather. This combination is excellent for creating a stable root zone.
Excellent Moisture Retention for Plants
Organic matter stands at 2.35%, which is higher than the national average of 2.0%. The available water capacity of 0.208 in/in is excellent, beating the state average of 0.183 in/in by a wide margin. This high capacity helps maintain plant health during the hottest parts of the year.
Managing Poorly Drained Hydrologic Groups
The soil is classified as somewhat poorly drained and falls into hydrologic group C, suggesting it can stay wet for long periods. Gardeners should consider using raised beds to help manage moisture levels during the wet Missouri spring. Proper drainage planning is essential for any construction projects.
Moisture-Loving Success in Zone 6a
Located in zone 6a, this county is well-suited for moisture-tolerant crops and cool-season vegetables like kale and peas. Grab your garden tools and start planting in this high-moisture silt loam today. Your plants will appreciate the consistent hydration provided by these soils.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Group C — Moderate-High Runoff
Soils with slow infiltration rates, often with a layer that impedes downward water movement. Higher clay content restricts drainage.
Drainage Class
Somewhat poorly drained
Water is removed slowly enough that the soil is wet at shallow depths for significant periods. Mottling present.
Soil Profile
Dominant texture: Silt loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Randolph County have?
Randolph County's soil is classified as Silt loam. This indicates the relative proportions of sand, silt, and clay — 15% sand, 63% silt, and 22% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Randolph County's soil acidic or alkaline?
Randolph County's soil has a pH of 6.1, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Randolph County?
Randolph County has a dominant drainage class of "Somewhat poorly drained." Poorly drained soils retain water for extended periods, which can limit crop choices and may require tile drainage or raised beds.
What crops or plants grow well in Randolph County's soil?
Based on Randolph County's Silt loam texture, pH of 6.1, and Somewhat poorly drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, rice, cranberries, and other water-tolerant species.
What USDA soil order is found in Randolph County?
Randolph County's dominant soil order is Alfisols. Alfisols are moderate to high base-status soils with a clay-enriched subsoil. They support productive forests and cropland across temperate regions.
Planning your lawn? View lawn care data for Randolph County on LawnByCounty.com →
Other Counties in Missouri
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.