This document summarizes a presentation on the profitability of precision agriculture given by Terry Griffin. It discusses farmers' increasing adoption of precision agriculture technologies over time, with GPS yield monitors and automated guidance being the most widely used. It also examines factors that influence farmers' likelihood of adopting other technologies. While information-intensive technologies require additional data and skills, embodied-knowledge technologies need minimal additional resources. The document outlines current precision agriculture utilization rates and trends in the profitability of various precision services over time. It stresses the importance of data quality and provides examples of how yield monitor data can be cleaned and filtered.