Studies of northern conifer (spruce-fir) ecology and silviculture have been conducted by the U.S. Forest Service on the Penobscot Experimental Forest in Maine since 1950. Long-term perspective, consistent treatment application, and frequent data collection result in an unusually robust assessment of the outcomes of silvicultural treatments and exploitative harvests. Presented by Laura Kenefic, USDA Forest Service, Northern Research Station, at the 2016 SAF National Convention, Madison, WI