There are many steps to greens aeirfication, here are a few pictures of the process:
This is the machine that pulls the cores.
They are then swept up and hauled off.
After the cores have been removed, amendments and seed are applied. The green is then topdressed with a heavy layer of sand, and the sand is drug into the holes with a brush pulled behind a cart.
Any holes that are still left open are then filled by hand with a push broom. Excess sand is then swept up and removed. The final step is to roll the green multiple directions to smooth the surface.