Toxic Heavy Metals in Farm Soil five times that of water http://smallfarms.oregonstate.edu/sfn/su10toxicmetals http://smallfarms.oregonstate.edu/sfn/su10toxicmetals http://smallfarms.oregonstate.edu/sfn/su10toxicmetals harmful heavy metals http://smallfarms.oregonstate.edu/sfn/su10toxicmetals http://smallfarms.oregonstate.edu/sfn/su10toxicmetals some warn