By two in the afternoon in July, Lincoln is all heat shimmer and cicadas, and the only shade for a block might be one hackberry leaning over a driveway. Grass Munchers LLC works the thick of that, because bermuda and fescue in a northwest Arkansas summer do not wait for comfortable weather. Every lot gets cut at the height it wants, trimmed around the posts and the play set, and edged until the concrete has a border again. Stepping back at the end of a hot round and seeing a yard that looks cool when the thermometer says otherwise is its own kind of payment. As the days shorten the mowing eases off and cleanup takes its place.