7 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 Daswir Additional Author Z. Poeloengan Additional Author Adlin U. Lubis Additional Author Dj. Pardede Additional Author PPKS Additional Author Kusnu Martoyo Additional Author Rachmat Adiwiganda Additional Author Hasril Hasan Siregar Additional Author Amir Purba Additional Author Angga Jatmika Additional Author Petrus Purba Additional Author P.L. Tobing Additional Author Adiwiganda, Y. Taryo Additional Author Sjukri Hamid Additional Author C.U. Ginting Additional Author H. Wibowo Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1996 cover_warta_vol4no3.jpg Kabul Pamin Additional Author Purboyo Guritno Additional Author PPKS Additional Author Dwi Asmono Additional Author TEGUH WAHYONO Additional Author Kusnu Martoyo Additional Author Zul Alfian Additional Author Gale Ginting Additional Author Fatmawati Additional Author Zulkarnain Poeloengan Additional Author Angga Jatmika Additional Author Sjafrul Latief Additional Author Muhammad Ikhwan Additional Author Basuli Wirjosentono Additional Author Ratu Evina Dibyantini Additional Author Muhammmad Lukman Fadli Additional Author Elsye L. Sisworo Additional Author mixed material 0853196X Medan Pusat Penelitan Kelapa Sawit (PPKS) 1998 cvr_6_N3_1998.JPG A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author Kiki Siregar Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.1_PEBRUARI_1992.jpg A. Djamin Additional Author A. Sipayung Additional Author Fidber Chan Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author Tejoyuwono Notohadiprawiro Additional Author Asep T. Toyib Additional Author R. Desmierde de Chenon Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1986 COVER_VOL.6_NO.2-3_DESEMBER_1986.jpg T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author R. Sukarji Additional Author O.S. Dharmaputra Additional Author A.L. Abadi Additional Author W.P. Suwandi Additional Author R.Y Purba Additional Author E.M. Fadli Additional Author H. Susilo Additional Author A. Makmur Additional Author G. Rahayu Additional Author Nur Chairat Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Tanah 1989 COVER_VOL.9_NO.2_AGUSTUS_1989.jpg 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