FACTS ABOUT ZINC SULFIDE REVEALED

Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can have many grams of zinc for each kilogram of dry soil. Levels of zinc in excessive of 500 ppm in soil interfere with the ability of crops to soak up other necessary metals, for example iron and manganese.Mining was unmechanized and labor-intense, with p