In the fall of 1975, we were contacted by C. J. Brannon, Jr. of Agriculture, Inc. (Fort Lauderdale, FL) and 0. S. Gray of Energy Transfer Corporation (Evansville, IN) regarding a possible boost in seed yield and number of pods in soybeans treated by microwaves. As a result, in 1976 we tested the responses of four cultivars adapted to Illinois to several microwave treatments. This is a preliminary and partial report of performances in that test.