Friday afternoon in Cory-Merrill, and the week ends the way it should: mower noise fading off down the block, walks blown clean, the smell of cut grass hanging over the parked cars. Lawn Services, Inc keeps the ordinary rounds through Belcaro, Bonnie Brae and the streets sloping toward Harvard Gulch — mowing, edging, trimming, hedge work, spring and fall cleanups, fertilization and aeration when the calendar calls for them. Nothing about it is complicated; all of it is cumulative. A lawn cut on time for an entire season looks different from one rescued twice, and everyone can see the difference even if they cannot name it. Come Saturday morning the yard is simply ready, and the weekend belongs to whoever lives there.