4 1 10 Sumitro, Djojohadikusumo Primary Author mixed material Jakarta INDIRA 1953 2441_11zon.jpeg.jpeg Eka Nuryanto Additional Author PUSAT PENELITIAN KELAPA SAWIT Additional Author Agus Susanto Additional Author Agus Eko Prasetyo Additional Author A. Razak Purba Additional Author Heri Adriwan Siregar Additional Author Hari Priwiratama Additional Author Hartanta Additional Author Sumitro Additional Author Wilner Manik Additional Author Andreas Panjaitan Additional Author Rajanaidu Nookiah Additional Author Ang Boon Beng Additional Author Mohammad Kohar Additional Author Indra Syahputra Additional Author Heryadi Syafii Additional Author Dwi Ratih Askasari Additional Author Safrizal Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2017 Cvr_Warta_PPKS_V22N2_Jun_2017.JPG Pusat Penelitian Kelapa Sawit (PPKS) Additional Author SUGIYONO Additional Author Muhammad Yusuf Ritonga Additional Author Muhammad Yusuf Ritonga, Eka Nuryanto Additional Author Arsyad D. Koedadiri, Rahdi Sumitro Additional Author mixed material 08532141 Medan Pusat Penelitian Kelapa Sawit (PPKS) 2008 cover_v16no3okt08.jpg Djojohadikesumo, Sumitro Additional Author mixed material