Soil labs by state
Arkansas
Arkansas homeowners use the University of Arkansas System Division of Agriculture soil-testing program centered on the Marianna Soil Test Laboratory. Official homeowner instructions emphasize taking your sample yourself, then using your local county Extension office for boxes, help, and drop-off; the lab also publishes an online submission portal and a soil shipping address.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- State soil lab
- Soil Testing and Research Laboratory (Marianna Soil Test Laboratory)
- Lab website
- Official page →
- Basic test price
- $0 per sample for Arkansas taxpayers
- Find your county Extension office
- Official page →
Official resources in Arkansas
Official homeowner page with sampling steps, county-office drop-off instructions, and the published no-fee statement for Arkansas taxpayers.
Official Marianna lab page with direct-delivery details, soil shipping address, online submission requirements, and county-office submission options.
Official University of Arkansas portal where sample information is entered electronically and accounts are created to submit samples and view reports.
Official county office finder residents use to locate their local Extension office for sample boxes, drop-off, and local help.
Key facts for Arkansas
- Arkansas taxpayers pay no fee for soil testing; out-of-state samples are $10 each. ([uaex.uada.edu](https://www.uaex.uada.edu/environment-nature/soil/soil-test.aspx))
- Homeowner instructions say to bring samples to the local County Extension office. ([uaex.uada.edu](https://www.uaex.uada.edu/environment-nature/soil/soil-test.aspx))
- The Marianna lab says samples may also be brought directly there in barcoded boxes after online entry. ([aaes.uada.edu](https://aaes.uada.edu/technical-services/soil-testing-and-research-laboratory/?utm_source=openai))
- The lab page lists a soil shipping address: PO Drawer 767, Marianna, AR 72360. ([aaes.uada.edu](https://aaes.uada.edu/technical-services/soil-testing-and-research-laboratory/?utm_source=openai))
- Sample information is submitted electronically at uasoiltest.uada.edu; the CES 435 form is no longer used. ([aaes.uada.edu](https://aaes.uada.edu/technical-services/soil-testing-and-research-laboratory/?utm_source=openai))
- County offices across Arkansas are listed on the official Extension county finder page. ([uaex.uada.edu](https://www.uaex.uada.edu/counties/default.aspx))
What to do next
- Collect separate samples for different areas of your yard or garden, air-dry them, and label each one clearly before submission.
- Use the county office finder to locate your local Extension office, then get a barcoded soil sample box or ask the office to help submit your sample.
- If submitting directly to the Marianna lab, create your account in the official soil-test portal first and follow the lab’s direct-delivery or shipping instructions.
Helpful guides
- How to take a soil sample for a lab test
- University soil labs vs. private labs vs. home kits
- How to read a soil test report
- Soil pH and lime: what your test is telling you