The University of Kentucky created a formula for predicting soybean yields based upon some sample data from your fields. We have provided a form that will allow you to put in some numbers and it will calculate your estimated soybean yield.
Calculations based upon the work of Lee, C. and J. Herbek. 2005. Estimating Soybean Yield. University of Kentucky Cooerative Extension. www.ca.uky.edu.