At the head of Otsego Lake the water lies flat as poured glass most mornings, and the hills above Springfield hold their mist until the first mowers start. Blishchik Lawn & Landscaping Inc. works the yards along that north shore and the lanes running back from it — mowing, trimming, edging clean lines against stone and gravel. Mulch goes down dark around the beds in May, and once the maples above the shore turn, the leaves come off the lawns in a hurry. It is straightforward work with a striking finish: a striped lawn running down toward the water, every edge cut sharp enough to throw a shadow.