cross-posted from: https://mander.xyz/post/2968180

cross-posted from: https://mander.xyz/post/2967556

I know I can send soil samples to my local university extension office for testing, but how do I test soil for glyphosate-based herbicides, lead, arsenic, and other contaminates?

As a citizen scientist I'm about to get into composting more on my property and would like to know more.