By A Mystery Man Writer
It's a test for healthy soil.
Moray farmer uses underwear to test soil fertility
How to Test Soil Health on Your Farm: 10 Key Methods
The Soil Your Undies Challenge- A Simple Home DIY Test for Soil
How farmers can test soil health with underwear
What Montana farmers can learn by soiling their underwear
Soil Your Undies Project
Get Ready to Soil Your Undies
The TN Environmental Council has mailed me underwear in a Soil your undies challenge. : r/mildlyinteresting
Soil Your Undies!
Soil Your Undies Challenge
The Tighty Whitey Challenge: Bury some old underwear to learn about soil health
Soil Your Undies 2023 - Oswego Lake Watershed Council
Soil Health and the Cotton Brief Challenge - Part 1 - Clackamas SWCD