Vroman's Nose stands over the Schoharie Valley like a held breath, and everything under it is bottomland the creek laid down over ages. Oak Hill Landscaping mows, trims and edges through that valley and up the limestone slopes on either side of it. Rich ground grows grass in a hurry, so the schedule holds steady from the first warm week to the last. Spring cleanups pull the winter mat off the turf; fall cleanups handle what the hardwoods drop all at once in October. A clean line along a walk, cut against all that open farmland, is a small and satisfying kind of order.