In order to keep grass on green so short, superintendents oftentimes need to use special mowers. On golf courses in particular, it's important to use reel mowers, instead of the classic rotary mower. This is because the reel spins and cuts grass with precision. The two most important considerations when mowing are cutting height and frequency. Considering these two items can help ensure a smooth surface for players. Similarly, sand topdressing is also crucial to ensure the turf grass surface is smooth and firm. This starts when sand is shoveled onto putting greens as needed.