The research about the effect of the frequency of preparing soil and KOL doses fertilizer on the yield of curl pepper (Capsicum annuum L.) was carried out from june until October, 1991, in Bringin village, Srumbung District, Magelang Regency, Central Java. The soil type Regosol, with altitude of 400 m and soil pH of 6-7. The method of the research was factorial with Ren- domized Completly Bloc…