A typical task for your GCM department on Mondays is spiking the greens. Spiking allows necessary air to penetrate the root zone helping with surface drainage and rooting.
The holes produced by the spiking are >1/4" and do not effect putting quality especially after rolling.
The finishing touch to the process is a light top dressing, almost dusting of sand. This sand incorporates into both the vertical mowing lines and spiking holes to aid in additional smoothness.