Posey County Soil Data
Posey County, Indiana
Avg pH
6.3
Texture
Sandy loam
Drainage
Poorly drained
Organic Matter
1.9%
Hydrologic Group
C/D
Data Story
About Soil in Posey County, Indiana
Inceptisols and Sandy Loam in Posey
The county's soil features an average pH of 6.26, which sits slightly lower than the national median of 6.5. This land belongs primarily to the Inceptisols order, characterized by its relatively young age and sandy loam texture. It provides a more neutral environment for plant growth than the Indiana state average of 6.08.
Balanced Composition for Better Airflow
Posey's soil consists of 23.6% sand, 59.6% silt, and 16.8% clay. This high silt percentage makes the ground feel smooth and holds moisture well, while the sand ensures decent aeration for root systems. It is generally easy to work, though high silt can lead to surface crusting after heavy rains.
Moderately Fertile Southern Plains
The organic matter content stands at 1.92%, nearly matching the national average of 2.0% but falling well below the state average of 4.90%. With an available water capacity of 0.196 inches per inch, the soil is slightly less efficient at storing water than the typical Indiana farm. Local growers often rely on soil amendments to boost these natural levels.
Managing Water in Slow-Moving Soil
Classified as poorly drained with a hydrologic group of C/D, Posey’s soil struggles to shed excess water naturally. This slow drainage poses challenges for construction and can delay field work during wet Indiana springs. Farmers often implement drainage tiles to manage the high water table effectively.
Long Growing Seasons in Zone 7a
Sitting in USDA Hardiness Zone 7a, Posey County enjoys a warmer climate than most of the state. This environment is perfect for late-season corn, soybeans, and even Southern-leaning specialty crops like watermelons. Grab some seeds and start your garden early to take advantage of the long growing window.
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
Poorly drained
Water is removed so slowly that the soil is wet at or near the surface much of the year. Drainage improvement usually needed.
Soil Profile
Dominant texture: Sandy loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Posey County have?
Posey County's soil is classified as Sandy loam. This indicates the relative proportions of sand, silt, and clay — 24% sand, 60% silt, and 17% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Posey County's soil acidic or alkaline?
Posey County's soil has a pH of 6.3, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Posey County?
Posey County has a dominant drainage class of "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 Posey County's soil?
Based on Posey County's Sandy loam texture, pH of 6.3, and 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 Posey County?
Posey 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.
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Other Counties in Indiana
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.