8 1 10 Adlin U. Lubis Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Purboyo Guritno Additional Author Donald Siahaan Additional Author Gale Ginting Additional Author Angga Jatmika Additional Author Supriyadi Sadi Additional Author Wahyono, Teguh Additional Author TRI HARYATI Additional Author Yohannes MS. Samosir Additional Author Y.B. Che Man Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 1996 cover_warta_vol4no2.jpg PPKS Additional Author Iman Yani Harahap Additional Author Luqman Erningpraja Additional Author Donald Siahaan Additional Author G. Simangunsong Additional Author Taufiq Caesar Hidayat Additional Author Eka LIstia Additional Author Bagus Giri Yudanto Additional Author TRI HARYATI Additional Author Elis Kartika Additional Author Yusuf Hasibuan Additional Author mixed material 0853196X Medan Pusat Penelitian Kelapa Sawit (PPKS) 2007 cvr_15_N3_2007.JPG PPKS Additional Author Luqman Erningpraja Additional Author Tjahjono Herawan Additional Author Donald Siahaan Additional Author Yurna Yenni Additional Author Condro Utomo Additional Author Retno Diah Setiowati Additional Author Bagus Giri Yudanto Additional Author Abdul Razak Purba Additional Author TRI HARYATI Additional Author SABARIDA Additional Author Nancy D. Haro Additional Author Endang Nurhayati Additional Author Saffrudin Additional Author mixed material 0853196X Medan Pusat Penelitian Kelapa Sawit (PPKS) 2005 cvr_13_N3_2005.JPG Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author S. Rahutomo, Arsyad D. Koedadiri Additional Author Syamsul Anwar, Petrus Purba Additional Author Eka Nuryanto, Enny Ratnaningsih, Herri Susanto Additional Author Donald Siahaan, Jenny Elisabeth, Tri Haryati, Purboyo Guritno, Yuniarti Yusak Additional Author Renni Yuliasari, Darnoko, Klaus Wulfert, Waldemar Gindulis Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2001 cover_warta_vol9no2.jpg Z. Poeloengan Additional Author Pusat Penelitian Kelapa Sawit (PPKS) Additional Author PPKS Additional Author Donald Siahaan Additional Author Tri Haryati, Donald Siahaan, Jenny Elisabeth Additional Author J. Elisabeth, Tj. Herawan, D. Siahaan, P. Guritno Additional Author T. Haryati, J. Elisabeth, D. Siahaan, Darnoko Additional Author Donald Siahaan, Jenny Elisabeth, Tri Haryati Additional Author Jenny Elisabeth, Tri Haryati, Donald Siahaan Additional Author mixed material 08532141 Medan PPKS 2000 cover_warta_vol8no1.jpg Iman Yani Harahap Primary Author Winarna Primary Author Luqman Erningpraja Primary Author Agus Eko Prasetyo Primary Author Donald Siahaan Primary Author Condro Utomo Primary Author Yusran Pangaribuan Primary Author Taufiq Caesar Hidayat Primary Author TRI HARYATI Primary Author Jenny Elisabert Primary Author Happy Widiastuti Primary Author agus su Primary Author mixed material 0853196X Medan Pusat Penelitian Kelapa Sawit 2008 jurnal_11zon.jpeg.jpeg 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 TRI HARYATI Additional Author mixed material s.l Univ. Putra Malaysia 1999 Cvr_Development_and....JPG