Saturday morning at Ralston Central Park is strollers, dogs and somebody's soccer game, and the yards nearby have to look like they belong to it. Deker Lawn Services holds that standard on the surrounding streets — mowing on a set day, edging along the walks, trimming where the mower cannot reach. Aeration and overseeding go in when the season turns, and fertilization follows so the color holds through the heat. Leaves come off in fall before the first hard freeze pins them down. Small, ordinary work; the whole block notices when it is done.