6 1 50 IMAN YANI HARAHAP Primary Author YUSRAN PANGARIBUAN Primary Author SUROSO RAHUTOMO Primary Author Edy Sigit Sutarta Primary Author Eka Listia Primary Author Tauiq Caesar Hidayat Primary Author G.Simangunsong Primary Author mixed material 9789798529801 Medan PPKS 2011 SP-No-2.jpg.jpg.jpg HIDAYAT, TAUFIQ CAESAR Primary Author WAN RISKI FAUZI Additional Author SUROSO RAHUTOMO Additional Author YUSRAN PANGARIBUAN Additional Author IMAN YANI HARAHAP Additional Author WILY ARIA HARSANTO Additional Author Edy Sigit Sutarta Primary Author Darmosarkoro, Witjaksana Primary Author Iman Budhi Santosa Primary Author mixed material 9786027539105;co Jakarta Balai Penelitian Hutan 1981 Untitled14.png.png TUMBAK SEREMPAK, UNDERPLANTING ATAU TUMPANG SARI EDY SIGIT SUTARTA Primary Author mixed material 9786027539013 Medan PPKS 2012 SP-No-7.jpg.jpg Darmosarkoro, Witjaksana Primary Author Edy Sigit Sutarta Additional Author Winarna Additional Author Eko Noviandi Ginting Director mixed material 9798529316 Medan Pusat Penelitian Kelapa Sawit 2003 lahan.GIF.GIF PENINGKATAN PRODUKTIVITAS KELAPA SAWIT MELALUI PEMUPUKAN DAN PEMANFAATAN LIMBAH PKS (MEDAN,19-20 APRIL 2005) Edy Sigit Sutarta Primary Author mixed material PPKS 2005 PUSAT PENELITIAN KELAPA SAWIT Edy Sigit Sutarta Primary Author mixed material Medan PPKS 2008