ABSTRACT The objective of the experiment is to know the influence of gamma-ray Co-60 on the soybean (Glycine max Merr) variety Wilis. The experiment was carried out from January 17, 1991 until late April, 1991 in the green house of Tidar University at Magelang, on latosol soil, with an altitude of 380 meters. Metodology of this experiment was arranged in com- pletely Random…