Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can have numerous grams of zinc for every kilogram of dry soil. Levels of zinc in excessive of 500 ppm in soil interfere with the power of vegetation to soak up other vital metals, like iron and manganese. https://dantebijkk.blogsmine.com/28542720/5-simple-statements-about-zinc-sulfide-explained