1 1 10 Kabul Pamin Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Witjaksana Darmosarkoro Additional Author Dwi Asmono Additional Author Tjahjono Herawan Additional Author Rachmat Adiwiganda Additional Author Arsyad D. Koedadiri Additional Author SUGIYONO Additional Author Endang Susilawati Additional Author Muhamad Ikwan Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1998 cover_warta_vol6no2.jpg