Here's what I want: - take a soil sample and put it in a cup, add solvent/water and shake - insert testing strip, or even drip into vials with reagents - compare color to back of the box to determine what adulterants are in the soil If I something like this were available locally, I'd see a price of 100 or less selling well for people interested in growing their own produce or simply gaining more insight into what's…
But this basic concept already exists. Farmers do this extensively.
https://content.ces.ncsu.edu/a-gardeners-guide-to-soil-testi...