Agriculture and manufacturing are both important contributors to Kansas' economy, with the former providing numerous raw materials for the latter. Kansas' farms and ranches have produced the most wheat and sorghum grains in the United States, as well as the highest quality wild hay, beef, and hogs. Despite some decrease, Kansas remains the nation's leader in wheat milling and is one of the top manufacturers of processed beef. A vast range of products is produced by manufacturing and processing operations. Wichita, the largest city in Kansas is a prominent manufacturer of camping equipment and heating and air-conditioning equipment, snowmobiles, and a variety of other items.