Shiawassee County Soil Data
Shiawassee County, Michigan
Avg pH
6.1
Texture
Sandy loam
Drainage
Well drained
Organic Matter
6.8%
Hydrologic Group
B
Data Story
About Soil in Shiawassee County, Michigan
Forest-Derived Spodosols
Shiawassee County features Spodosols with an average pH of 6.14, staying close to the national median of 6.5. This pH level is significantly more hospitable to general agriculture than the more acidic state average of 5.30. The dominant sandy loam texture reflects the county's glacial history and forest heritage.
Sandy Loam for Ease of Use
The soil is composed of 59.4% sand, 24.5% silt, and 12.2% clay. This sandy loam mix is highly valued by farmers for its ease of tillage and rapid warming in the spring. While it drains quickly, the silt and clay components provide enough structure to prevent total nutrient loss.
Reliable and Resourceful Soils
The county's organic matter sits at 6.83%, more than triple the national average but lower than the state's peat-heavy average of 19.76%. An available water capacity of 0.164 in/in indicates that irrigation might be necessary during dry July weeks. These soils respond exceptionally well to compost and organic amendments.
Naturally Well-Drained Terrain
Shiawassee's soils are classified as well drained and belong to hydrologic group B. This means water moves through the profile at a moderate rate, reducing the risk of root rot for crops. Gardeners find these soils easy to work even after heavy rains because they do not stay muddy for long.
Flourishing in Zone 6a
The 6a hardiness zone allows for a long growing season that suits everything from soybeans to apple orchards. The well-drained sandy loam is particularly excellent for root vegetables like carrots and potatoes. It is an ideal environment for anyone looking to establish a productive home garden.
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
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
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 Shiawassee County have?
Shiawassee County's soil is classified as Sandy loam. This indicates the relative proportions of sand, silt, and clay — 59% sand, 25% silt, and 12% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Shiawassee County's soil acidic or alkaline?
Shiawassee 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 Shiawassee County?
Shiawassee County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Shiawassee County's soil?
Based on Shiawassee County's Sandy loam texture, pH of 6.1, and Well drained, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens, most annual and perennial crops.
What USDA soil order is found in Shiawassee County?
Shiawassee County's dominant soil order is Spodosols. Spodosols are acidic soils with a distinct subsurface layer of organic matter and iron/aluminum. They typically form under coniferous forests in cool, humid climates.
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Other Counties in Michigan
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.