Below is a picture I’ve used in a previous post showing the top 3” of the greens soil profile on the left and 3-6” on the right. The picture on the right is the original sand profile and the picture on the left is the same sand, but with twenty years of organic accumulation. Results from a physical soil analysis that we do annually indicate that water infiltrates through the profile on the right over 36” per hour. The results for the sample on the left is less than 6” per hour. A very dramatic difference and the major reason why we core and topdress the greens.
So that’s what the lab says. Here is a picture that may help you further understand why we core the greens.
That's two minutes of water and in case your wondering, that's not good. We will core the greens the week of the 27th using 3/8" tines. We are going smaller and tighter to aide recovery time.