Prairie grass restoration

The AP reports on a Native American project in Minnesota to restore native prairie grass fields. The tribal leaders are studying their old maps and other historic sources of information to figure out the right plants to put in the right places. It isn't a trivial matter, since the seeds can cost a little more than your average home depot seed packs:

"Some of these seeds are worth more than their weight in precious metals," said Mike Whitt, an environmental specialist for the Mdewakanton tribe. He said the tribe has spent about $600 an acre just to buy the seed mix needed to create prairie.