Iowa faces an erosion problem

One of the reasons Iowa has agriculture success, is the rich dark soil. Federal officials now say the heavy rainstorms in recent years have torn away at the soil and it has begun to thin. Data compiled by Iowa State shows soil in parts of the state has eroded by as much as 12 times the rate that the government considers sustainable. Conservation measure may be imposed that would require farmers to leave stalks and other crop residue in fields, and build terraces into hillsides.