It's a test for healthy soil.
Healthy Soil Archives • Green Living Journal
The Tighty Whitey Challenge: Bury some old underwear to learn about soil health
Soil Your Undies Lesson: By Rachel Wilson - Seed St. Louis
How to Test Soil Health on Your Farm: 10 Key Methods
Soil Your Undies 2023 - Oswego Lake Watershed Council
There's a good reason why you saw soiled undies at Eco Experience
Moray farmer uses underwear to test soil fertility
Comox Valley Land Trust launches 'Soil Your Undies' challenge - Comox Valley Record
Underpants experiments are taking place in Australian paddocks and