Dawn in Palmyra arrives over flat ground and long fields, mist sitting in the low bends of the Sebasticook until the sun burns it away. G.A. Tasker Property Services runs lawn care across that country — mowing, trimming, edging, mulching beds and clearing yards in spring and again in fall. Out here a lawn sits in the open with nothing to hide behind, so a crooked line carries a hundred yards. Straight passes, tight corners, the trimmer run along every post and foundation: that's the standard the ground demands. It's a good feeling to leave a farmyard looking as square as the fields around it.