2 1 10 Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author Rolettha Y. Purba Additional Author R. A. Lubis Additional Author Fidber Chan Additional Author Sudharto Ps Additional Author D. Ansyari Additional Author Okky S. Dharmaputra Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1993 COVER_VO._13_NO.1_FEBRUARI_1993.jpg Kabul Pamin Additional Author Eka Nuryanto Additional Author PPKS Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author R. Desmier De Chenon Additional Author Amir Purba Additional Author Tjahyono Herawan Additional Author Sudharto Parwirosukarto Additional Author Renni Yuliasari Additional Author Rolettha Yani Purba Additional Author Indra Eko Setyo Additional Author E. Lamade Additional Author Witjaksana Darmosakoro Additional Author mixed material 0853196X Medan Pusat Penelitian Kelapa Sawit (PPKS) 1999 cvr_7_N2_1999.JPG