Maize is a critically important source of food, feed, energy and forage in the USA

► Ethanol production from maize has increased price of grain and changed diets for livestock, especially ruminants. ► Byproducts from the ethanol industry have effectively replaced maize grain in ruminant diets. ► Reduced supply and increased price of maize grain for livestock feeding has increased use of maize silage and maize residues.