Fog sits low over the South Branch of the Grand River most summer mornings, and Napoleon Township comes out of it one field at a time. RiverCity Lawn Services starts in that hour — mowing, trimming and edging while the air is cool and the grass cuts clean. Bottomland yards near the water grow hard and fast; the upland lots want a lighter hand. Knowing which is which is the difference between a cut lawn and a good one. By mid-morning the fog is gone and a half-dozen properties look like their owners simply got lucky.