Late August in Great Barrington: the Green River runs low and warm through the meadows west of town, and the grass has finally stopped racing. D Banks Landscapes works the lawns of those valley properties — mowing, trimming around stone walls and fence posts, edging where turf meets a gravel drive. Berkshire ground grows a thick lawn if you give it what the season asks for, and the reward is a yard that holds its color deep into October. Spring cleanups pull winter's grit out of the beds; fall cleanups take the leaf drop off before rain mats it down. It is ordinary, weekly, visible work, and a lawn cut clean on a Friday afternoon is its own argument.