South Dakota Extension & Soil Testing Directory
Find your local South Dakota County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: SDSU Recommended Partner Soil Testing Labs
Standard Fee: $15 routine soil sample
Turnaround Time: 5 to 7 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Chernozem Prairie Black Silt Loam
Hardiness Zones: Zone 4b / 5a
Popular Crops: Corn, soybeans, sunflowers, sweet corn, brassicas
Northern Plains black soils are highly fertile; test to avoid excessive phosphorus buildup.
Featured County Directories in South Dakota (1 Listing)
Minnehaha County
Extension Office: SDSU Extension - Sioux Falls Regional Center
Soil Lab Fee: $15 routine soil sample
Phone: (605) 782-3290
Looking for Another County in South Dakota?
Every county in South Dakota is supported by the state Land-Grant University Extension system. If your specific county directory is currently being indexed, you can submit your soil samples directly to SDSU Recommended Partner Soil Testing Labs or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently Asked Questions: South Dakota Soil & Extension
How do I get my soil tested in South Dakota?
To test your soil in South Dakota, 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 SDSU Recommended Partner Soil Testing Labs or your local county extension office.
How much does soil testing cost in South Dakota?
Routine soil fertility analysis in South Dakota typically costs $15 routine soil sample. Turnaround time for results is usually 5 to 7 business days.
Does every county in South Dakota have a Cooperative Extension Office?
Yes. Every county in South Dakota 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 South Dakota.
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.