1) South Dakota's largest industry is agriculture, producing crops like wheat, corn, alfalfa, and soybeans as well as livestock. 2) The bison population dramatically declined to under 1,000 by the late 1800s after being hunted but has since rebounded to around 250,000 with protection. 3) South Dakota became the 40th state in 1889 after Dakota Territory was divided into North and South Dakota.

1. South Dakota A to Z by Mary

20. Missouri River Reservoir System Big Bend Dam and Lake Sharpe Reservoir Oahe Dam and Oahe Reservoir Gavins Point Dam and Lewis and Clark Reservoir Fort Randall Dam and Lake Francis Case Reservoir s Oahe Big Bend Fort Randall Gavins Point Montana North Dakota Wyoming Nebraska Kansas Missouri Iowa South Dakota Colorado