Soil Testing

Until our office reopens, we are not able to send soil samples for processing. We recommend you work directly with VAS (formerly AgSource). For help interpreting lawn & garden samples, contact Kaitlin Bricco, Horticulture Educator at, for field samples contact Kevin Jarek, Crops and Soils Agent at


Information about VAS (formerly AgSource) can be found at the link below: 

VAS/AgSource Laboratories 


The VAS Labs located in Bonduel test soil samples brought into the Extension office.  Generally it takes seven to ten business days for the lab to process the sample and send out its findings.  A copy of their findings is forwarded to the Extension Horticulture Educator if you require interpretive assistance.

Examples of tests offered:

  • Field Sample
  • Lawn and Garden
  • Wildlife Food Plot

Download the instructions for how to take a soil sample in the link below.

Instructions for sampling Garden Soils and Turf pdf


Instructions on how to take a soil sample:

   Soil sampling instruction chart
Take at least 10 soil cores and mix them together thoroughly.
Soil cores should be taken to the same depth that the roots grow.  This means 5 to 7 inches for most gardens and turfgrass areas.  For golf course putting greens and tees, 4 inches is more appropriate.
Place 1 to 2 cups of the well-mixed soil in a clean plastic bag or a soil testing bag from your county Extension office.  Fill out the appropriate soil test form that is located on the sidebar and bring it with your payment to the Extension office or directly to the soil testing laboratory.
Soil probes are available for a rental fee.  (The fee can be applied to the cost of having your soil sample processed.)  Payment can be made by credit card, cash or check.
For more information on soil and turf, please visit Extension Learning Store at or take the Shortcut to Lawn and Turf at the Learning Store.





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