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Lumbanraja, Jamalam and Nugroho, Sutopo Ghani and Niswati, Ainin and Ardjasa, Wayan Sabe and Subadiyasa, Netera and Arya, Nyoman and Haraguchi, Hiroki and Kimura, Makoto (1998) Methane emission from Indonesian rice fields with special references to the effects of yearly and seasonal variations, rice variety, soil type and water management. Hydrological Processes, 12 (13-14). pp. 2057-2072.

Lumbanraja, Jamalam and Syam, Tamaluddin and Nishide, Hiroyo and Mahi, Ali Kabul and Utomo, Muhajir and Sarno, - and Kimura, Makoto (1998) Deterioration of soil fertility by land use changes in South Sumatra, Indonesia: from 1970 to 1990. Hydrological Processes, 12. pp. 2003-2013.

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Salam, Abdul Kadir (1998) Peranan Kadar Air dan Waktu Inkubasi dalam Penetapan Aktivitas Enzim Fosfatase dalam Tanah. Journal of Tropical Soils, 3 (2). pp. 129-134. ISSN 0852-257X

Salam, Abdul Kadir and Arata, Katayama and Kimura, Makoto (1998) Activities of some soil enzymes in different land use systems after deforestation in hilly areas of West Lampung, South Sumatra, Indonesia. Soil Science and Plant Nutrition, 44 (1). pp. 93-103. ISSN 0038-0768

Salam, Abdul Kadir and Desvia, Yessi and Subiyantoro, Riyadi and Susanto, Herry and Utomo, Muhajir (1998) Changes in the Activities of Phosphatase and -Glucosidase by Long-Term Soil Tillage Systems. Pros Seminar Nasional VI Budidaya Pertanian Olah Tanah Konservasi. pp. 417-422. ISSN 02168308

Salam, Abdul Kadir and Djuniwati, Sri and Novpriansyah, Hery (1998) Perubahan Kelarutan Seng Asal Limbah Industri di dalam Tanah Tropika Akibat Penambahan Kapur dan Kompos Daun Singkong. Journal of Tropical Soils, 3 (2). pp. 111-117. ISSN 0852-257X

Salam, Abdul Kadir and Djuniwati, Sri and Sarno, - (1998) Perubahan Kelarutan Tembaga dan Kadmium dalam Kolom Tanah dengan Perlakuan Kapur dan Kompos Daun Singkong akibat Pencucian dengan Air. Journal of Tropical Soils, 4 (1). pp. 43-50. ISSN 0852-257X

Salam, Abdul Kadir and Djuniwati, Sri and Sinawung, Saja (1998) Translocation of Heavy Metals in Columns of A Tropical Soil Treated with Lime and Zeolite. Jurnal Teknik Lingkungan, 4 (1). pp. 7-10. ISSN 0854-1957

Salam, Abdul Kadir and Marintias, Catri and Djuniwati, Sri and Harahap, Joni T. (1998) Perubahan Fraksi Labil Seng Asal Limbah Industri dalam Beberapa Jenis Tanah Tropika Akibat Perlakuan Kapur dan kompos daun singkong. Journal of Tropical Soils, 4 (1). pp. 51-57. ISSN 0852-257X

Salam, Abdul Kadir and Philip, A. Helmke (1998) The pH dependence of free ionic activities and total dissolved concentrations of copper and cadmium in soil solution. Geoderma, 83. pp. 281-291. ISSN 00167061

Salam, Abdul Kadir and Sarno, - and Sriyani, Nanik (1998) Tanggapan Tanaman Jagung terhadap Limbah Industri Berlogam Berat di Tanah Ultisol Sidosari Natar Lampung. Prosiding Seminar Nasional dan Pertemuan Tahunan Komisariat Daerah HITI Tahun 1998 (2). pp. 436-441. ISSN 979-95354-1-7

Salam, Abdul Kadir and Susilo, Joko and Sriyani, Nanik (1998) Lead Availability and Absorption by Green Kyllinga (Cyperus kyllingia L.), Corn (Zea mays L.), and Amaranth (Amaranthus tricolor L.) in Gedongmeneng Soil Treated with a Lead-Containing Electronics Industrial Waste and Lime. Jurnal Agrotropika, 3 (2). pp. 19-23. ISSN 0216-7662

Salam, Abdul Kadir and Yusnaini, Sri and Rachmalia, Saja (1998) Sixteen Week Changes in Phosphatase Activities in An Organic Matter Treated Ultisol from Tan jungan Lampung. Pros Sem Pertemuan Ilmiah Tahunan Peranan Mikrobiologi dalam Agroindustri untuk Menunjang Ketahanan Pangan Nasional. pp. 332-339. ISSN 979-8958-49-7

Salam, Abdul Kadir and Zubair, Annas and Sriyani, Nanik (1998) Aktivitas Fosfatase Asam di Daerah Perakaran Padi Sawah dalam Sistem Tanam Bibit dan Tanam Benih dengan Memanfaatkan Herbisida Pratumbuh. Pros Seminar Nasional Peningkatan Produksi Padi Nasional. pp. 38-41. ISSN 0216-830

Salam, Abdul kadir and Zubair, Annas (1998) Aktivitas Fosfatase Asam di Daerah Perakaran Padi Sawah dalam Sistem Tanam Bibit dan Tanam Benih dengan Memanfaatkan NPK dan Zeolit. Pros. Seminar Peningkatan Produksi Padi Nasional. pp. 34-37. ISSN 0216-830

Sriyani, Nanik and Salam, Abdul Kadir (1998) Accumulation of Lead and Copper and Growth of Several Tropical Weeds in A Lead Contaminated Soil Treated with Lime. Jurnal Agrotropika, 3 (2). pp. 24-28. ISSN 0216-7662