Weekday mornings, MJ lawn servies moves through Clifton one block at a time, starting while the grass still holds dew and the air is still worth breathing. Small yards, corner lots, the long strip beside a driveway, each one mown, trimmed, edged and cleared of cuttings before the heat takes over the day. In a valley this dry a lawn is a weekly commitment or it is nothing, and the schedule is most of the trick. Come home at five and the work is finished and gone. There is real pride in leaving nothing behind but an even, tidy yard.