AKELEY, Minnesota — Minnesota is known and loved, in part, for its majestic deep, dark forests. …But our Northwoods are in trouble, according to local scientists, and are at risk of becoming grasslands in as little as 50 years because trees can’t adapt as quickly as our weather is warming. …It’s spring, and that means the Badoura State Forest Nursery in Akeley is humming, with seedlings boxed by the hundreds. …But this operation is a fraction of what it once was in Minnesota, according to Doug Tilma, forestry manager with the Minnesota Department of Natural Resources. “If you go far enough back in history, yes, we had more tree nurseries,” Tilma said. “I think in the early 60s the state produced about 40 million seedlings per year, that was towards the peak. So you can see that, you know, there’s been ebbs and flows in the amount of seedling production in our history.”