Saturday morning in Townsend Center, Route 13 still quiet, and somewhere two streets over a mower starts up. Northern Lawn & Landscape is often that sound: weekly mowing, trimming around trees and posts, crisp edges along drives and walks. The season opens with a cleanup that clears whatever March left behind and closes with the leaves gathered and gone. Grass cut at the right height holds its color deep into the fall, which is the quiet argument for doing it properly. One town, a great many lawns, every one of them handled the same careful way.