Morning on Mattanawcook Lake comes with loon calls and a skin of fog that burns off about the time the mowers start. BTS Property Management & Sales keeps Lincoln lawns and grounds in order through the green months — mowing, trimming, edging, property upkeep, and spring and fall cleanups. In a lake town a lawn does double duty: it is the yard you live in and the first thing anyone sees when they pull in. Getting the edge right along a gravel drive is a small art, and it changes how a whole place reads. By the time the sun is well over the water, the property looks like somebody is minding it.