Soils contaminated with zinc from mining, refining, or fertilizing with zinc-bearing sludge can have a number of grams of zinc for each kilogram of dry soil. Levels of zinc in excessive of 500 ppm in soil interfere with the power of crops to soak up other necessary metals, including iron https://titusayawy.spintheblog.com/29008832/infrared-zinc-sulfide-things-to-know-before-you-buy