Under every Oak Ridge lawn there is glacial rock — the Highlands were scraped and left this way, and the stone walls running off through the trees are the record of everyone who once tried to farm it. Garden State Groundskeeping & Landscapers tends the grass people have coaxed on top of all that, mowing it even, trimming what the mower can't reach, edging the beds back to a clean line. The soil is thin and the season compressed, which makes steady upkeep the difference between a lawn and a field. Cleanups clear the yard at both ends of the year, sticks and matted leaves out of the way of new growth. It is groundskeeping in the plain sense: a piece of stubborn ground, kept.