Soil My Undies Challenge: Measuring Soil Biology with a Pair of Briefs

Soil Your Undies Challenge – McLean County Ag in the Classroom

Soil Your Undies Challenge - Rhode Island

Sonoma's “Soil My Undies Challenge” Going Viral - Sonoma Magazine

Soil Your Undies exhibit at New Hanover County Arboretum

Soil My Undies” Challenge Has Farmers Burying Underwear In Their

Soil Your Underwear Challenge – Saint Louis Science Center

The only time you want to see holes in your undies - Napa Master

Soil Your Underwear to Test Your Soil - Laidback Gardener

I see London, I see France, Farmers Buried Underpants (to Test