Sand fractions: topdressing vs. OM2 layer

I looked at the topdressing sands used at fifteen different golf courses, and then I checked the particle size analysis from each golf course from their most recent OM246 test. I looked at the particle sizes in the 0 to 2 cm layer, and I compared those to the particle sizes of the topdressing sand. This chart shows the average difference for each sieve size, going from what was in the topdressing sand to what was measured in the 0…