It's a test for healthy soil.
Underpants experiments are taking place in Australian paddocks and
Soil Your Undies, PA Soil Health Coalition
Soil Your Undies Challenge - Rhode Island
Tattered underwear means healthier soil
Soil your undies!
Soil Your Undies challenge aims to educate, improve soil health
Soil Your Undies, PA Soil Health Coalition
With rotten undies comes good soil
Benjamin Logan AFNR students “soil your undies” soil test – Ohio
Soil Your Undies Challenge
How to properly bury your undies for the Soil Your Undies
Environment Archives - Page 38 of 72 - Regeneration International
Soil Your Undies Challenge
Soil Your Undies Lesson: By Rachel Wilson - Seed St. Louis