In the past five years, three Nebraska tribes – the Winnebago, the Iowa Tribe of Kansas and Nebraska and the Ponca Tribe of Nebraska – have bought an estimated 3,000 acres, total, of farmland that was …In the past five years, three Nebraska tribes – the Winnebago, the Iowa Tribe of Kansas and Nebraska and the Ponca Tribe of Nebraska – have bought an estimated 3,000 acres, total, of farmland that was …