Soil contamination with heavy metals is a serious issue in all the world, and these heavy
metals are released from both natural and human resources, especially agricultural activities
in the environment. Therefore, in this study, the amount of heavy metals and the indicators of
ecological risk potential and integrated pollution in soil samples before rice planting and
after rice harvesting in Mazandaran province have been investigated. A mixture of nitric acid,
hydrofluoric acid and perchloric acid was used for chemical digestion of soil samples and …