There’s a new spreadsheet available from PACE Turf that uses the temperature-based growth potential to estimate the quantity of sand required as topdressing. They wrote:
“To get a rough idea of how much sand to apply over the course of the year, we have developed a simple spreadsheet that uses growth potential (GP) as a guide, and a maximum sand application of 150 lbs dry sand/1000 ft2 per month at maximum turf growth.