The deep tine aerator we used on the greens this year is a very welcome addition to our equipment inventory. With this piece of equipment we can pull a hollow core up to 10 inches deep or penetrate the soil with a solid tine up to 12 inches deep. This aerator differs from our normal aerators in two ways. One is the depth and the other is the fracturing of the soil. The main reason for a deep tine is obviously compaction relief but one other reason is to break through the compacted layer of soil left from years of conventional aerators that only go 4 to 6 inches deep. This depth is all dependent on the size of the tine and the quality of your soil. The deep tine will actual lift the soil up to a 1/2 inch breaking up the soil structure and promoting air and water infiltration.