Toxins in the soil would enter through the root system first.
arsenic
Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc).
I’m pretty sure it’s called an EKG, or something close to that.