Effects of agricultural pollution on water and subterranean soil of Bahokalat river of Iran with reference to heavy metals

The universal growth of the population and the daily growing need for food caused the agriculture to improve more than ever, and more lands goes under cultivation every year.Different procedures have been applied to cultivate more products from one unit of an agricultural land, such as using different chemical substances like chemical fertilizers, weed fi ghters and insect killers.Applying such materials in agriculture causes pollution in surface and subterranean waters, hence for controlling the pollution we should have exact information about the amount of the dopants, specially heavy metals in aquatic and soil environments.In this research while taking samples of Bahokalat river waters in six stations , as well as taking samples from agricultural soils randomly in three stations, the density of heavy elements have been measured by atomic absorption machine.One-sided variance analyze test has been applied to compare the average of the heavy metals in the mentioned stations.