Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can incorporate many grams of zinc for every kilogram of dry soil. Amounts of zinc in surplus of 500 ppm in soil interfere with the flexibility of crops to absorb other critical metals, for instance iron and manganese. https://infraredzincsulfide56519.snack-blog.com/26672970/the-infrared-zinc-sulfide-diaries