5 1 50 Darmosarkoro, Witjaksana Primary Author Sutarta, Edy Sigit Primary Author Akiyat Primary Author Sugiyono Primary Author mixed material MEDAN Pusat Penelitian Kelapa Sawit 2008 Seri_Kelapa_Sawit_Populer_01_Pembibitan_Kelapa_Sawit.jpg.jpg Darmosarkoro, Witjaksana Primary Author Purba, Petrus Primary Author Sutarta, Edy Sigit Primary Author Fadli, M Lukman Primary Author Sugiyono Primary Author mixed material 9798529642 MEDAN Pusat Penelitian Kelapa Sawit 2006 SERI_BUKU_SAKU_21_PEMBUKAAN_LAHAN_DAN_PENANAMAN_KELAPA_SAWIT.jpg.jpg Darmosarkoro, Witjaksana Primary Author Purba, Petrus Primary Author Sutarta, Edy Sigit Primary Author Fadli, M Lukman Primary Author Sugiyono Primary Author Ginting, Eko Noviandi Primary Author mixed material 9798529634 MEDAN Pusat Penelitian Kelapa Sawit 2006 SERI_BUKU_SAKU_20_KELAPA_SAWIT_PADA_LAHAN_GAMBUT.jpg.jpg Darmosarkoro, Witjaksana Primary Author Sutarta, Edy Sigit Primary Author Siregar, Hasril Hasan Primary Author Sugiyono Primary Author Darlan, Nuzul Hijri Primary Author mixed material 9798529391 MEDAN Pusat Penelitian Kelapa Sawit 2005 SERI_BUKU_SAKU_03_PENINGKATAN_EFEKTIVITAS_PEMUPUKAN_KELAPA_SAWIT.jpg.jpg Winarna Primary Author Sutarta, Edy Sigit Primary Author Sugiyono Additional Author mixed material 9798529448 MEDAN Pusat Penelitian Kelapa Sawit 2005 SERI_BUKU_SAKU_07_PEDOMAN_PENGAMBILAN_CONTOH_DAUN_DAN_TANAH_PADA_TANAMAN_KELAPA_SAWIT.jpg.jpg