 This study demonstrates the potential of UAV based structure from motion, SFM, photogrammetry, to accurately measure crop height and growth rate in open field trials. The technique produces highly accurate measurements of crop height variation both at the field level and within individual plots, providing a valuable tool for agricultural researchers seeking to maximize crop yield while minimizing resource usage. This article was authored by Fenner H. Holman, Andrew B. Reesh, Adam Michalski, and others.