Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can contain several grams of zinc per kilogram of dry soil. Levels of zinc in surplus of 500 ppm in soil interfere with the ability of vegetation to soak up other essential metals, for example iron and manganese. https://alexisxywvq.blogdemls.com/27508303/the-5-second-trick-for-infrared-zinc-sulfide