Wolf Point, Mont. -- Sioux and Assiniboine tribe members wailed a welcome song as around 60 bison from Yellowstone National Park stormed onto a prairie pasture in March that had not felt a bison's hoof for almost 140 years.

That historic homecoming came just 11 days after 71 pureblood bison, descended from one of Montana's last wild herds, were released nearby onto a swath of untilled grassland owned by a charity with a vision of building a haven for prairie wildlife. Some hunters and conservationists are now calling for bison to be reintroduced to a million-acre wildlife refuge spanning this remote region.

"Populations of all native Montana wildlife have been allowed to rebound except bison; it's time to take care of them like they once took care of us," said Robert Magnan, 58, director of the Fort Peck Indian Reservation's Fish and Game Department, who will oversee the transplanted Yellowstone bison program.

But with several groups navigating a complex and contentious path to return bison to these plains, agribusiness is fighting back. Many farmers and ranchers fear that bison, particularly those from Yellowstone, might be mismanaged and damage private property, and worry that they would compete for grass with their own herds.

"Bison are a romantic notion, but they don't belong today," said Curt McCann, 46, a Chinook rancher who last month drove four hours to a public meeting in Jordan to speak against bison reintroduction.

When the explorer Meriwether Lewis followed the Missouri River through this region in 1805, he came across bison herds he described as "innumerable." Just eight decades later, a young Theodore Roosevelt noted that all that remained were "countless" bleached skulls covering the Montana badlands.

Scientists estimate that tens of millions of bison once roamed America, but by 1902 there were only 23 known survivors in the wild, all hiding from poachers in a remote Yellowstone valley.

For decades, attempts to transplant bison from the rebounding Yellowstone herd were thwarted, despite requests from tribes to steward some of the animals.

"I call them my brothers and sisters because they are a genetic link to the same ones my ancestors hunted," said Tote Gray Hawk, 54, a Sioux, who has brought the Fort Peck bison hay and water each day since their arrival.

Their meat, lower in cholesterol than beef, will feed elderly tribe members and their skulls will be used in traditional sun dance ceremonies, he said.

The last hunt for indigenous bison on the Fort Peck reservation happened in 1873. In the 1880s, hundreds of tribal members starved to death on the barren land. Around them homesteaders from Europe began wresting an agricultural living from this windswept expanse of rolling amber in northeast Montana. Most of the neighboring farmers and ranchers today are descendants of those pioneers, and they safeguard their traditions with generational grit.

"Bison is a big issue that could really impact our livelihood," said Brett Dailey, 52, who ranches near Jordan.

Today there are 3 million cattle in Montana, and agribusiness is the state's biggest industry, but not a single bison roams free.

A 2011 survey commissioned by the National Wildlife Federation showed that a majority of state residents support reintroducing huntable bison to the vast Charles M. Russell National Wildlife Refuge, similar to a Utah herd created in 1941 from the last few bison allowed out of Yellowstone.

"Within this sea of agriculture, there is room for small islands of conservation," said Sean Gerrity, president of the American Prairie Reserve, the charity that brought the group of genetically pure bison back to a pasture just north of the refuge.

The arrival of Yellowstone bison was welcome news around the troubled Fort Peck Reservation.

When the first calf was born late last month, a rust-colored baby bull, tribal flags still hung at half staff for a teenage boy who had committed suicide days earlier. Rates of poverty, unemployment, disease and addiction hover stubbornly above national averages here.

Census data show that around northeast Montana, a prairie expanse almost the size of Indiana, most county populations peaked in the early 1900s and have since dropped by almost half.

The region's fastest growing economic engine, oil production, is proving a mixed blessing. In 2010, the Environmental Protection Agency reported that toxic chemicals from nearby drilling contaminated drinking water supplies for Poplar, a reservation town of around 3,000. This year, a schoolteacher from Sidney, near the North Dakota border, was kidnapped during her morning jog and murdered. The suspects are two Colorado roughnecks.

"These bison represent healing," said Iris Greybull, 62, of Poplar.

The bison debate has dredged up old tensions between tribes and their neighbors. Before Greybull, a Sioux, spoke in favor of the animals last fall at a fractious meeting in Glasgow, dozens of farmers and ranchers walked out in protest.

She and other tribal members say they see an ugly double standard in the fact that there are more than 130 private bison ranches in the state, including one belonging to the mogul Ted Turner housing dozens of controversial Yellowstone bison, and yet only the Fort Peck herd has been visited by protesters.

But some say the bison on the ranches do not pose the threat that the wild ones do.

"Unless they have the German wall and a moat with a bunch of crocodiles and piranhas, they're not going to contain those woolly tanks," said state Sen. John Brenden of nearby Scobey, who has long done battle on the bison issue in the Legislature.

Around a century ago, some Yellowstone bison contracted disease from domestic livestock, and in recent decades thousands have been slaughtered in an effort to protect ranchers' herds.

At the direction of Gov. Brian Schweitzer of Montana, a few of these bison were quarantined for years and certified healthy.

Some may soon go to the Fort Belknap Indian Reservation, about 170 miles west of Fort Peck, pending the outcome of a lawsuit filed by opponents.

"I took a lot of arrows for this, but it was the right thing to do," Schweitzer said. "If you want to get into a fistfight in Montana, go into a bar and share your opinion about bison or wolves."