[Levels of toxic metals in agricultural crops grown in the ecologically endangered region]

cadmio cadmium chemical contamination cinc cobre compound feeds contaminantes industriales contamination chimique copper cuivre ensilado ensilage (produit) forraje verde fourrage vert green feed haylage henificado industrial pollutants lead manganese manganeso mercure mercurio mercury nickel paille paja piensos compuestos plomb plomo polluant industriel reglamentaciones regulations silage slovak republic straw trigo wheats zinc