7 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 Wahyono, Teguh Primary Author Agustira, M. Akmal Primary Author Nurkhoiry, Ratnawati Primary Author mixed material Medan Pusat Penelitian Kelapa Sawit 2006 2200190_10_11zon.jpeg.jpeg Pusat Penelitian Kelapa Sawit (PPKS) Additional Author Eka Nuryanto Additional Author Iman Yani Harahap Additional Author Agus Susanto Additional Author Winarna Additional Author Agus Eko Prasetyo Additional Author Heri Santoso Additional Author Yurna Yenni Additional Author Nuzul Hijri Darlan Additional Author Iput Pradiko Additional Author Sujadi Additional Author Donnarina Simanjuntak Additional Author Rizki Amalia Additional Author Wahyono, Teguh Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2015 Cover_Warta_Vol._20_No._1_Februari_2015.pdf13.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 Wahyono, Teguh Additional Author mixed material Yogyakarta Univ. Gadjah Mada 1993 Kumpulan_tugas-tugas_review_literature.jpg Adopsi teknologi dan efisiensi relatif. Kasus PIR-Trans Sei Pagar, PIR-Trans Sari Lembah Subur dan PIR-Berbantuan Ophir Wahyono, Teguh Additional Author mixed material Yogyakarta UGM 1996 Wahyono, Teguh Additional Author mixed material Yogyakarta UGM 1997