1 1 10 Pusat Penelitian Kelapa Sawit (PPKS) Primary Author Sujadi Primary Author Supena, Nanang Primary Author RAHUTOMO, Suroso Primary Author Suprianto, Edy Primary Author Yenni, Yurna Primary Author Nazri, Erwin Primary Author Setiowati, Retno Diah Primary Author Wening, Sri Primary Author Siregar, Heri Adriwan Primary Author mixed material 14103362 Medan Pusat Penelitian Kelapa Sawit 2018 2200146.jpeg.jpeg