Out here the blueberry barrens turn red before the maples do, and Route 9 runs east through miles of low color and granite. Perkins Salvage mows, trims and hauls off what the season leaves behind, working Baileyville dooryards and properties scattered toward Alexander and Topsfield. The work is plain and the result isn't: a rough lot brought back to a straight cut, brush cleared out, the ground opened up to the air again. Summer is short in this county, so the machines run while the light holds. By the time the barrens color up, the lawns are squared away.