South Nashua wakes early along Salmon Brook, dew still heavy on the grass and the first mower of the day audible three streets over. A.W. Mowing keeps to that hour, moving lot to lot with clean lines, tight trimming around fence posts and hydrants, and edges cut sharp enough to read from the sidewalk. A city lawn is a small thing, but it is the first thing anyone sees, and a straight stripe against a driveway apron says the whole house is looked after. Spring brings the raking and the winter debris; autumn brings the long slow work of leaves off Gate City yards. The tools are simple and the result is the argument.