The ground around South Brunswick lies flat and generous, old sod and soybean country that gives an evening its full length of light. Joseph's Landscaping & Lawn Care Inc. works that long green hour, when Heathcote Brook runs low and the mowers finally throw a cool smell instead of a hot one. Mowing, trimming, edging and cleanups make the ordinary spine of the week, spring through the last leaf-heavy weekends. When storms come across from the west, the same crew turns to plowing, clearing drives and walks and salting the shaded spots that stay slick past noon. Lawns here should look like they belong to the fields that came before them — even, unfussy, cut to a line.