17 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 Adlin U. Lubis Additional Author A. Purba Additional Author PUSAT PENELITIAN KELAPA SAWIT Additional Author A. Sipayung Additional Author P. Purba Additional Author Rolettha Y. Purba Additional Author P. Girsang Additional Author E. Manalu Additional Author Arief Priyambodo Additional Author Nugroho Kusnohadi Additional Author Rohayati Suprihartini Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1995 Cover_Warta_PPKS_Vol_3_No_3.jpg P.Purba ,A.U.Lubis Primary Author mixed material Marihat Ulu, Pematang Siantar 1985 PT.PERKEBUNAN_VI-VII.JPG.JPG Pusat Penelitian Kelapa Sawit (PPKS) Additional Author E.S. Sutarta Additional Author SUGIYONO Additional Author Luqman Erningpraja, A. Kurniawan, H. Santoso Additional Author Nuzul H. Darlan, E.S. Sutarta, P. Purba Additional Author Eka Nuryanto, T. Herawan Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2005 cover_warta_vol13no1.jpg Pusat Penelitian Kelapa Sawit (PPKS) Additional Author SUGIYONO Additional Author Wahyono, Teguh Additional Author Heri Santoso, Winarna Additional Author Arsyad D. Koedadiri, Rolettha Y. Purba, P. Purba Additional Author Eka Nuryanto, Tri Haryati Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2004 cover_warta_vol12no13.jpg Ir. H. Adlin U. Lubis Additional Author Ir. Fidber Chan Additional Author Ir. E. Manalu Additional Author Ir. Kiki Siregar Additional Author Ir. P. Purba Additional Author Ir. H.S. Situmorang Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1987 P. Purba Additional Author T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author Kiki Siregar Additional Author A.Sipayung Additional Author R.M. King Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Perkebunan Marihat 1992 A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author Kiki Siregar Additional Author A.R. Purba Additional Author R. Sukarji Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1988 COVER_VOL.8_NO.1_APRIL_1988.jpg Adlin U. Lubis Additional Author P. Purba Additional Author Fidber Chan Additional Author Sri Wahyuni Additional Author Suheimi Syukur Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1986 COVER_VOL.6_NO.1_APRIL_1986.jpg Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author Endang Syamsuddin Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author R.A. Lubis Additional Author R. Desmier de Chanon Additional Author Soedharto Ps Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.2_JUNI_1992.jpg