We plan to aerate our greens on Monday and hopefully have the process complete on Tuesday. The course will be open on Tuesday for regular play. In preparing for this process, we have to check out our equipment to insure everything is set up properly. Our nursery green has a different base than our regular putting greens so we have to do a couple of passes on the very back of a green that is in play. I would use the practice green but it is the first part of the golf course that most people see so I prefer not have it partially aerated.
#4 is the green that we are using because of its easy access and the overall depth of the green which will allow us to keep the hole location toward the front for the next couple of days. We are also using our core harvester on a newer utility vehicle this season so it could be checked out as well. The new machine has a much lower PSI(pounds per square inch) weight which should reduce some of the tire imprinting that the much older 3 wheeled unit caused in past years. This will not eliminate the heaving because we are pulling cores at a depth of 6" but it should be reduced. The 6" deep aeration hole will allow roots to move down into the soil layer that is at about 3-5" of depth. Each green has a varied amount of depth of sand. As I have mentioned in the past, we are topdressing our greens with a sand that is more coarse than the sand that was used for many years. The existing sand has created a very tight water holding and oxygen starved root profile which reduces the ability of the greens to drain and keeps them very soft on the surface after rain events. The holes will be filled with the coarse sand during our process which will help to provide deep channels for roots to grow and moisture to be allowed to move through the root profile.
The pass on the right is at a depth of about 3". The pass on the left is full depth of about 6". You can see the diffence in material that is brought up to the surface.