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State in southern central USA, bordered to the south by
Texas, to the west, at the extreme of the Oklahoma panhandle, by
New Mexico, to the north by
Colorado and
Kansas, and to the east by
Missouri and
Arkansas; area 177,847 sq km/68,667 sq mi; population (2000) 3,450,700; capital
Oklahoma City. It is nicknamed the Sooner State because during the
Oklahoma Land Run in 1889, when the land was opened up to white settlers, many took land before it was officially allowed. The state has a number of land regions, including the
Ozark Plateau, the Prairie Plains, and the Ouachita Mountains. Oklahoma ranks among the leading states in petroleum and natural gas production, and it is the only US state that produces iodine. Beef cattle are the major source of agricultural income and cowhands still ride the range, although ranching has been thoroughly modernized. Other towns and cities are Tulsa, Norman, Lawton, Broken Arrow, Edmond, Midwest City, and Enid. Oklahoma is the US state most associated with American Indians, and has the largest American Indian population of any of the states, most of whom are descended from the 67 tribes who inhabited the
Indian Territory. Oklahoma was admitted to the Union in 1907 as the 46th US state.
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