NOT KNOWN FACTUAL STATEMENTS ABOUT INFRARED ZINC SULFIDE

Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can comprise numerous grams of zinc for each kilogram of dry soil. Amounts of zinc in excess of five hundred ppm in soil interfere with the ability of vegetation to soak up other essential metals, including iron and manganese.Mining was unmechanized and lab