PF 3000TM Grain Yield Monitoring The most widely-used grain yield monitoring technology. On a combine, the PF3000 system displays and records yield, moisture, combine speed, grain flow, acres, distance, wet bushels, dry bushels, and acres per hour, plus more. It organizes data by year, farm, field, grain, and load for easy identification. Data can be transferred to a computer to print a summary of all fields. Print yield and moisture maps of the fields you have harvested when using GPS and a memory card.