All versions of this dairy product are salty. This included cattle, beef, and dairy product exports. This is a list of dairy product companies in the United States. Tine is the largest Norwegian dairy product cooperative. It was one of the state's five active dairy product plants in 2004. This pasteurization plant was used to manufacture Nilgiris' store brand of dairy product. Skyr is an Icelandic cultured dairy product. Cheese became the most important dairy product. A related recipe for skyr, a cultured dairy product, appears in the early 13th century. Supply management limits the production of dairy product in Canada, and imposes tariffs on imports. Food sources include eggs, green vegetables, milk and other dairy product, meat, mushrooms, and almonds. In Iceland they are popularly eaten with skyr (a cultured dairy product similar to yoghurt). It is a dairy product produced by souring heavy cream. Quroot (or Qoroot) is a reconstituted dairy product. Dairy product processing is also important to the local economy.