A: The proper amount of divot mix (usually sand or a mixture comprised primarily of sand) is surprisingly small because it should be only the amount needed to replace the soil that was removed. Filling divot level higher than the existing playing surface, i.e. turfgrass canopy, is overfilling. Not only is this a waste of divot mix, but the extra sand will slow turfgrass recovery because seedlings and/or lateral regenerative growth of surrounding vegetation will be scalped by mowers. This leads to the second problem when divots are overfilled because sand particles dull and damage mower blades.
Source: “Fore The Golfer”