Soil series profile
Kirkland soil series
Kirkland is a well drained soil with a silt loam surface, mapped on 683,875 acres in 32 counties across 3 states. Hydrologic group D.
- Drainage class
- Well drained 100% of mapped acres
- Hydrologic group
- D 98% of mapped acres
- Typical topsoil pH
- 5.9 moderately acidic · range 5.9–6.5
- Mapped area
- 684k acres in 32 counties, 3 states
Typical Kirkland profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–8 in (Ap) | Silt loam | 5.9 | 19% | 21% | 2% |
| 8–19 in (Bt) | Silty clay | 7.5 | 42% | 13% | 1.5% |
| 19–28 in (Btss) | Silty clay | 7.9 | 47% | 12% | 1.5% |
| 28–51 in (Btkss) | Silty clay | 7.7 | 48% | 12% | 0.75% |
| 51–82 in (Btk) | Silty clay | 7.8 | 44% | 8% | 0.75% |
What this means
What Kirkland soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Kirkland soils is moderately acidic: pH 5.9 (most land between 5.9 and 6.5). Many vegetables grow well here, and some gardens benefit from a little lime. Test before adding any.
Loamy topsoil (loam, silt loam and similar) covers 94% of mapped Kirkland acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (90% of mapped Kirkland acres).
100% of mapped Kirkland acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On 100% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.
For a septic system
For conventional septic absorption fields, NRCS rates 94% of the acres in mapped Kirkland soils very limited, 0% somewhat limited and 0% not limited (6% not rated, such as urban land, pits or water).
Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Kirkland soil is found
Mapped acres
Kirkland is mapped in Oklahoma, Kansas and Texas.
| County | Acres | Share of county land |
|---|---|---|
| Grant County, OK | 141,146 | 22.1% |
| Garfield County, OK | 123,474 | 18.3% |
| Kay County, OK | 103,441 | 17.6% |
| Sumner County, KS | 75,872 | 10.1% |
| Noble County, OK | 39,104 | 8.4% |
| Clay County, TX | 27,518 | 4.0% |
| Stephens County, OK | 24,749 | 4.4% |
| Canadian County, OK | 24,048 | 4.2% |
| Jefferson County, OK | 21,623 | 4.5% |
| Harper County, KS | 17,388 | 3.4% |
| Cleveland County, OK | 13,146 | 3.8% |
| Oklahoma County, OK | 12,780 | 2.8% |
| Logan County, OK | 12,175 | 2.6% |
| Blaine County, OK | 10,600 | 1.8% |
| Grady County, OK | 7,567 | 1.1% |
| McClain County, OK | 6,389 | 1.8% |
| Kingfisher County, OK | 5,535 | 1.0% |
| Major County, OK | 3,740 | 0.6% |
| Payne County, OK | 3,693 | 0.9% |
| Pawnee County, OK | 3,197 | 0.9% |
| Wichita County, TX | 1,556 | 0.4% |
| Lincoln County, OK | 1,358 | 0.2% |
| Cowley County, KS | 1,181 | 0.2% |
| Pottawatomie County, OK | 925 | 0.2% |
| Garvin County, OK | 618 | 0.1% |
| Woods County, OK | 538 | 0.1% |
| Sedgwick County, KS | 217 | 0.0% |
| Kingman County, KS | 124 | 0.0% |
| Osage County, OK | 107 | 0.0% |
| Seminole County, OK | 25 | 0.0% |
| Cotton County, OK | 22 | 0.0% |
| Comanche County, OK | 22 | 0.0% |
Septic absorption fields
NRCS rating, share of Kirkland acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 94.1% |
| Not rated | 5.9% |
Drainage, water table and flooding
Share of Kirkland acres
- Depth to seasonal high water table
- None reported within about 6.5 feet (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 0–2% (median 2%).
- Topsoil organic matter
- Median 2%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 100.0% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 0.0% |
| C: slow infiltration | 1.6% |
| D: very slow infiltration (clayey, shallow or wet) | 98.4% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 0.0% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Kirkland (component kind "Series") in SSURGO: 683,875 acres.
- Method
- Shares are by mapped acres of Kirkland components. The profile comes from the single largest Kirkland component. Full methodology.