It's a test for healthy soil.
Soil Your Undies Challenge Natural Resources Conservation Service
Resonate - Cheryl Haskett, Southern Ontario's Agritourism
Soil Your Undies' challenge encourages people to bury cotton
Dirty undies help American researchers to test Tennessee soil
Environment Archives - Page 38 of 72 - Regeneration International
I see London, I see France, farmers buried underpants to
Soil Your Underwear Challenge – Saint Louis Science Center
What Montana farmers can learn by soiling their underwear
Farmers Have Been Soiling Their Undies. Here's Why - Hundred
FFA News – Page 35 – Ohio Ag Net
Farmers are soiling their undies and making strides with soil
FFA News – Page 35 – Ohio Ag Net
FFA News – Page 35 – Ohio Ag Net