North Babylon summers arrive with cut grass in the air and a little salt in it off the Great South Bay, and the light hangs over Belmont Lake well past dinner. Metro Turf Pros, Inc. mows and trims straight through that season on sandy south-shore ground that dries fast and greens fast, holding a crisp line along walks, drives and bed borders. String trimming, blowing the clippings off every hard surface, and spring and fall cleanups round the work out — and in October the oaks and maples let go all at once. A striped lawn on a Friday afternoon, edges cut sharp, is a genuinely satisfying thing to drive past. That is the week's work in North Babylon and the towns beside it.