By August the ground around Milan has gone hard and the corn stands tasseled and still in the heat, and a lawn will tell you fast whether anyone is paying attention to it. Heath Lawncare LLC keeps its routes on schedule through that stretch — cutting high when the sun is punishing, trimming the fence lines, edging where the grass wants to creep over the concrete. Spring and fall bring the heavier days: the raking, the hauling, the yard opened up or put to bed. Every week the mowers come back around, and the block looks the better for it. It is unglamorous work, and it is the whole difference between a yard and a lawn.