Soil sample kits can be picked up for free at your local county UW-Extension office.
For more information on soil testing, visit the UW Soil Lab website.
Please note that your local UW-Extension office does not test soil samples. Once you pick up a soil sample bag packet from your local office, please follow the instructions provided and mail sample to the Soil & Plant Analysis Lab:
UW Soil & Forage Analysis Lab
2611 Yellowstone Drive
Marshfield, WI 54449