The Still River threads the whole length of Brookfield, and in early spring the valley greens from the bottom up while the white church on the green still stands bare against the sky. M&G EVERGREEN SERVICES LLC opens the year with cleanups — pulling winter out of the beds and off the lawn — then settles into the weekly rhythm of mowing, trimming and edging that carries through to October. Yards along the Route 7 corridor sit on old rocky ground, and getting them even takes attention more than horsepower. By June the cut lines run true and the borders are crisp, and that is exactly the point. A valley looks best when the small places inside it are kept.