Iowa Corn Growers Association will begin developing policy next week when delegates gather for the annual Grass Roots Summit.  Iowa Corn Growers Association chairman of the board, Lance Lillibridge says it is an exciting time for corn growers.  Lillibridge says the use of the popular herbicide Atrazine remains a hot issue for corn growers.  He says the Environmental Protection Agency is proposing a significant reduction in the use of Atrazine.  The Iowa Corn Growers official says the commodity organization will be hosting a series of nicknamed “Pay Dirt” forums at the Farm Progress Show that begins on Tuesday.  Lillibridge says forums will cover a variety of topics from the farm bill to conservation methods, to politics, and even beer.  Lillibridge says the forums will be held in the administrative building near the center of the Farm Progress Show grounds.