Soil Your Undies Challenge: Part 1
Soil Your Undies Campaign Northern Virginia Soil and Water Conservation District
Soil Your Undies Challenge Natural Resources Conservation Service
How active is your soil? Try the underwear test! – ONfruit
Sonoma's “Soil My Undies Challenge” Going Viral - Sonoma Magazine
2021 Soil Your Undies - how to bury your undies
The Soil Your Undies Challenge- A Simple Home DIY Test for Soil Health@judyschickens
CAFFflix
Plant your pants! Duke of Westminster's charity urges people to bury their underwear
Underpants experiments are taking place in Australian paddocks and gardens — all in the name of soil health - ABC News
Tattered underwear means healthier soil
Underwear Measures Soil Microbial Activity