Each summer as it gets hot and wet one of the best cultural practices that we can do is called "venting" or "needle tine aerification". The greens have had a tremendous amount of foot traffic, maintenance traffic and too much rainfall that has caused the root zone to seal off. By venting the green with the needle tines we can open up a small channel or pathway to allow a good exchange of gases and allowing water to pentetrate better through the soil profile. We have 2 machines that we operate on greens and we are able to do 18 holes a day. We then roll the surface to smooth up the disruption. Most golfers do not even notice the venting procedure.