Clay County Soil Data
Clay County, Kansas
USDA SSURGO / PHZMAvg pH
6.4
Texture
Silt Loam
Drainage
N/A
Organic Matter
2.5%
Hydrologic Group
N/A
Data Story
About Soil in Clay County, Kansas
Productive Soils of North Central Kansas
Clay County soils feature a pH of 6.37, which is slightly more acidic than the national median of 6.5. This sits comfortably below the state average of 6.80 but remains within a very productive range. The county's soil score of 68.5 is well above the state average, signaling high agricultural potential.
A Silty Mix with Solid Balance
The soil is comprised of 51.6% silt, 25.1% sand, and 23.3% clay. This mixture provides enough sand for aeration while the high silt content ensures stability and nutrient storage. It is a versatile composition that supports a wide variety of row crops and garden vegetables.
Excellent Moisture and Nutrient Retention
With 2.53% organic matter, Clay County exceeds both the national (2.0%) and state (2.22%) averages. The available water capacity is also impressive at 0.190 in/in, surpassing the state benchmark of 0.180. This means the soil is naturally equipped to sustain growth during dry periods.
Steady Hydrology for Consistent Yields
While specific drainage classes are unavailable, the high available water capacity suggests these soils are efficient reservoirs. The balanced ratio of sand and clay likely promotes moderate infiltration and good root health. This is a dependable soil profile for both large-scale farming and home landscaping.
Hearty Gardens in Zone 6b
Clay County is in Zone 6b, a perfect spot for growing staples like tomatoes, corn, and sunflowers. The rich organic matter (2.53%) and high water capacity make it an ideal location for a vegetable garden. Your soil is already above average—just add seeds and basic maintenance to see great results.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Silt Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Clay County have?
Clay County's soil is classified as Silt Loam. This indicates the relative proportions of sand, silt, and clay — 25% sand, 52% silt, and 23% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Clay County's soil acidic or alkaline?
Clay County's soil has a pH of 6.4, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Clay County?
Drainage class data is not currently available for Clay County.
What crops or plants grow well in Clay County's soil?
Based on Clay County's Silt Loam texture, pH of 6.4, 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 Clay County?
The dominant USDA soil order for Clay County is not currently available in our dataset.
Soil & Planting Advisory: Clay County
Soil Verdict
Clay County is in USDA hardiness zone 6b, a moderate climate zone. where winter lows can reach -5°F. Freeze-thaw cycles are moderate; soil biology slows in winter but recovers reliably in spring, supporting a broad range of plants.
Planting Guidance
A wide plant palette is possible: deciduous trees, most shrubs, cool-season vegetables, and many perennials thrive here. Winter protection (mulch, burlap wraps) helps push the zone boundary for desired species. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Moderate freeze-thaw cycles naturally aerate the soil but can also cause compaction in clay-heavy areas; annual core aeration is beneficial. Organic matter amendments decompose at a moderate pace — aim for 3-5% organic content for optimal fertility. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Clay County closely matches the Kansas average hardiness conditions.
Planning your lawn? View lawn care data for Clay County on LawnByCounty.com →
Other Counties in Kansas
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.