GRPDGrand Rapids Police Department (Michigan)
GRPDGreater Richmond Pipes & Drums (Richmond, VA)
GRPDGordon Randall Perry Design, Inc (New York, NY)
References in periodicals archive ?
1] are unknown fitted constants, GRPD is as described above and TEMP is temperature in degrees celcius.
Instead of regressing GRPD on temperature, they suggest using the reciprocal of time (in days) to 50% germination:
Abbreviations: EMERG, emergence; GDD, growing degree days; GDH, growing degree hours; GRPD, germination rate per day; RMSE, root mean square error; TEMP, temperature.