Late August on the river flat below New Boston, the air goes heavy by two in the afternoon and the bottomland grass grows like it has somewhere to be. Rural King Tractors mows through that heat, taking the wide open stretches and the tight strips along the road and bringing a yard back down to one even height. Trimming and edging follow, so the place where lawn meets gravel is a line again instead of a suggestion. When the season winds down, the cleanups clear what the sycamores and maples let go. There is a plain satisfaction in the last pass of a hot day: the machine shut off, the whole property quiet and level.