Out along the river's slow water the turtles line up on a half-sunk log every warm afternoon, which is about the pace summer keeps around here. Snappin Turtle Lawncare moves a good deal faster through Capital — weekly mowing, trimming, edging and cleanups from the first green-up to the last leaf. Heat and humidity build over this flat country until a storm breaks them, and turf cut at the right height comes through those swings far better. The work leaves a yard even, its borders clean and the drive cleared, nothing tracked back inside on anybody's shoes. A small thing done often is what keeps a lawn looking like summer instead of merely surviving it.