The influence of some air pollution components on the contamination of agricultural crops

air pollution analyse de sol cadmio cadmium cereal crops chrome chromium cinc cobre contamination copper cromo csfr cuivre cultivos de cereales desarrollo regional dioxyde de soufre environmental factors facteur du milieu factores ambientales lead mercure mercurio mercury nitrogen oxides oxyde d'azote plomb plomo pollution du sol regional development rfcs rfts soil pollution soil testing sulphur dioxide zinc