From the top of Powow Hill you can see how much of Amesbury is still open ground — Woodsom Farm's fields running green down the slope, the salt marsh flat and silver off to the east. Mountain men services keeps yards in that town cut on schedule: mowing, string-trimming the edges, cutting clean lines along drives and walks, mulching beds, and the seasonal cleanups at either end of the year. Coastal Essex County greens up late and holds late, which makes for a long and forgiving stretch of work. A well-kept lawn out here borrows something from the farmland around it — the same evenness, on a smaller scale. Lawn care in Amesbury and the towns at the mouth of the Merrimack.