(Elsevier) Silage is the fermented and acidic stored feed from agricultural crops routinely fed on dairy and livestock farms worldwide. In the United States, corn silage production increased by approximately 33 percent between 1982 and 2012, and 2.61 million hectares are currently used for corn silage production. Because of its importance to dairy science and agriculture more broadly, the Journal of Dairy Science assembled a special issue on silage to add critical insight and information to the available literature.