By early June, Jamaica's village greens up all at once — white clapboard, black shutters, and grass coming on faster than anyone plans for. Landscape Constructions Inc keeps pace with mowing, string trimming around posts and plantings, edging that gives a walk its outline back, and seasonal cleanups that clear brush, leaves and whatever winter left behind. Up the Pikes Falls road the yards run to slope and ledge, and cutting well there is a matter of reading the ground before the deck ever drops. They like leaving a place better composed than they found it: lines true, corners closed. Jamaica, South Londonderry, Wardsboro and the surrounding towns make up their working circle.