Late April, and Shadow Lake has shed its ice while the lawns around it are still deciding what they will be this year. Integrity Turf, LLC starts right there — raking out the winter mat, the first mow of the season, core aeration where the ground has packed down, overseeding the thin ground, feeding the turf, and cutting beds back to a clean line. Turf is a slow argument, won over a whole season rather than an afternoon, and the answer shows up in July. The work runs through Salem's neighborhoods and out toward Windham. Grass thick enough to walk barefoot on is the entire ambition.