8/5/2011 4:08 AM
In a lot of cases it's the double cut from where the reels overlap. Sometimes it can be adjust by reel or ground speed. A flatter bedknife attitude with extended knives will help out a little also. Our bent fairways never have those lines, but our poa/bent get them often, unless we're under primo regulation or mowing daily. If they're growing aggressively we see them right after, and the next day none. We do a shade cut and mow in gang formation, so that has some to with it too. If it's a Deere or Toro, you can make some easy adjustments. If it's a Jac, you can only change bedknives and rollers to change bedknife attitude as the frames are fixed.