The AgroSonic is a proprietary device that emits a periodic, high-frequency sound designed to stimulate plant growth. Agrosonic was utilized to observe and quantify the growth and yield of sunflower cropsoveraneight-weekperiodonthePacificBiodieselFarmsofMaui,HI. Theexperimentwasdesigned to test 12 subplots with and without the Agrosonic device to quantify the effects of periodic sound on plant growth and yield over an 8-week period (Figure 1). The subplots for Agrosonic (green squares) and Controls (gray squares) were randomized throughout the 40 x 60 ft plot.