Gully-washing storms erode Iowa’s topsoil
Some 15 million tons of Iowa's topsoil washed into waterways from Iowa fields in the first half of this year, says the Environmental Working Group in a report that calls for more erosion-prevention work.
Some 15 million tons of Iowa's topsoil washed into waterways from Iowa fields in the first half of this year, says the Environmental Working Group in a report that calls for more erosion-prevention work.