ABSTRACT A research about Agronomic Performance of Some Red Pepper (Capsicum annum. L) Hot Beauty Varieties as a Result of Gamma Co-60 Radiation. The research has been conducted at Ngluwar village, Ngluwar district, Magelang regency, from July to December 1997 on the Regosol soil and altitude of 390. The aim is to know the effect of gamma ray radiation on the change of agronomic cha…