6 1 10 Adlin U. Lubis Additional Author Iman Yani Harahap Additional Author TEGUH WAHYONO Additional Author Endang Syamsuddin Additional Author M. Lukman Fadli Additional Author A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author R.A. Lubis Additional Author R. Desmier de Chanon Additional Author Soedharto Ps Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.2_JUNI_1992.jpg A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author Kiki Siregar Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1992 COVER_VOL.12_NO.1_PEBRUARI_1992.jpg Endang Syamsuddin Additional Author A. Sipayung Additional Author T.L. Tobing Additional Author Sudharto Ps Additional Author Suwandi Additional Author A.U. Lubis Additional Author B. Naert Additional Author R. Gal Additional Author J. Olivin Additional Author Desmier de Chenon Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1990 COVER_VO.10_NO.1_APRIL_1990.jpg T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author R. Sukarji Additional Author O.S. Dharmaputra Additional Author A.L. Abadi Additional Author W.P. Suwandi Additional Author R.Y Purba Additional Author E.M. Fadli Additional Author H. Susilo Additional Author A. Makmur Additional Author G. Rahayu Additional Author Nur Chairat Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Tanah 1989 COVER_VOL.9_NO.2_AGUSTUS_1989.jpg A. Sipayung Additional Author P. Purba Additional Author T.L. Tobing Additional Author Kiki Siregar Additional Author A.R. Purba Additional Author R. Sukarji Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Marihat 1988 COVER_VOL.8_NO.1_APRIL_1988.jpg P. Purba Additional Author T.L. Tobing Additional Author Kusnu Martoyo Additional Author Suwandi Additional Author Kiki Siregar Additional Author A.Sipayung Additional Author R.M. King Additional Author mixed material 02161427 Pematang Siantar Pusat Penelitian Perkebunan Marihat 1992