DETAILED NOTES ON ZINC SULFIDE

Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can contain quite a few grams of zinc per kilogram of dry soil. Levels of zinc in extra of 500 ppm in soil interfere with the ability of plants to soak up other necessary metals, such as iron and manganese.Mining was unmechanized and labor-intense, with pic