3 1 10 Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Kusnu Martoyo Additional Author W. Darmosarkoro, I.Y. Harahap, E. Syamsuddin Additional Author Syamsul Anwar, Dja\'far, Arsyad D. Koedadiri Additional Author Winarna, Arsyad D. Koedadiri, Edy S. Sutarta Additional Author Eka Nuryanto, Purboyo Guritno Additional Author Dja\'far, Syamsul Anwar, P. Purba Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2001 cover_warta_vol9no3.jpg Kabul Pamin Additional Author Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Purboyo Guritno Additional Author Christa U. Ginting Additional Author Eka Nuryanto Additional Author TEGUH WAHYONO Additional Author A. Sipayung Additional Author Amir Purba Additional Author Angga Jatmika Additional Author Donald Siahaan, Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1997 cover_warta_vol5no1.jpg Kabul Pamin Additional Author Purboyo Guritno Additional Author Eka Nuryanto Additional Author Subronto Additional Author PPKS Additional Author Tjahjono Herawan Additional Author R. Sukarji Additional Author Edy Sigit Sutarta Additional Author FADZRI PURNOMO Additional Author DIWAN Prima Ariana Additional Author JENNY Elisabeth Additional Author Angga Jatmika Additional Author SUGIYONO Additional Author Sjafrul Latief Additional Author Krismawati Sinaga Additional Author mixed material 0853196X Medan Pusat Penelitian Kelapa Sawit (PPKS) 1999 cvr_7_N1_1999.JPG