Milk production is no different between cows fed corn silage and corn grain from a genetically modified corn hybrid versus cows fed corn silage and corn grain from a traditional hybrid. That finding was shared by KansasStateUniversity researchers in mid-March at the American Dairy Science Association Midwest regional meeting. The milk production of cows on both diets averaged 98.4 pounds per cow per day. The transgenic hybrid used in the study is resistant to western corn rootworm and tolerant to the active ingredient in the herbicide Liberty.