Oklahoma Extension & Soil Testing Directory
Find your local Oklahoma County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: OSU Soil, Water and Forage Analytical Laboratory
Standard Fee: $10 per routine soil sample
Turnaround Time: 3 to 5 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Oklahoma Red Clay Loam & Sandy Alluvium
Hardiness Zones: Zone 6b / 8a
Popular Crops: Wheat, pecans, watermelons, tomatoes, bermudagrass
Oklahoma soils often present acidic surface layers; test pH before establishing lawn turf.
Featured County Directories in Oklahoma (5 Listings)
Oklahoma County
Extension Office: Oklahoma State University Extension - Oklahoma County
Soil Lab Fee: $10 per routine soil sample
Phone: (401) 555-0199
Tulsa County
Extension Office: Oklahoma State University Extension - Tulsa County
Soil Lab Fee: $10 per routine soil sample
Phone: (401) 555-0199
Cleveland County
Extension Office: Oklahoma State University Extension - Cleveland County
Soil Lab Fee: $10 per routine soil sample
Phone: (400) 555-0199
Comanche County
Extension Office: Oklahoma State University Extension - Comanche County
Soil Lab Fee: $10 per routine soil sample
Phone: (400) 555-0199
Payne County
Extension Office: Oklahoma State University Extension - Payne County
Soil Lab Fee: $10 per routine soil sample
Phone: (401) 555-0199
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Oklahoma Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions: Oklahoma Soil & Extension
How do I get my soil tested in Oklahoma?
To test your soil in Oklahoma, collect 10 to 12 soil cores from a depth of 4 to 6 inches across your garden or field, air-dry the sample indoors, fill out your county extension submission form, and submit it to OSU Soil, Water and Forage Analytical Laboratory or your local county extension office.
How much does soil testing cost in Oklahoma?
Routine soil fertility analysis in Oklahoma typically costs $10 per routine soil sample. Turnaround time for results is usually 3 to 5 business days.
Does every county in Oklahoma have a Cooperative Extension Office?
Yes. Every county in Oklahoma is served by the state's Land-Grant University Extension system. While our directory highlights primary regional office hubs and university labs, local extension agents serve horticulturists, farmers, and home gardeners across all counties in Oklahoma.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.