Early on a June morning the reservoir at Woodcliff Lake steams, and the mist walks up the lawns on the streets above it before the sun can burn it off. J C Landscaping Inc is out in that hour, mowing while the air is still cool and the ground firm enough to take a machine without marking. The big shaded lots here run to fine turf under old trees, so the cut is set high and the passes laid down long and straight. Trimming cleans the stone walls and the tree rings; edging keeps beds and drives from blurring at their margins. By the time the day is fully up the yards are finished, and the only sign left is the smell of cut grass hanging in the wet air.