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Samy J., . and Zulkefli Malik, . Organic farming. -18. ISSN 0127-1458
Zulkefli Malik, . Reducing nitrogen wastage. 19-. ISSN 0127-1458
Zulkefli Malik, . and Liza Nuriati Lim Kim Choo, . and Ismail Abu Bakar, . Soil CO2 flux from tropical peatland under different land clearingtechniques. pp. 131-137. ISSN 1394-9829
Zulkefli Malik, . and Che Fauziah Ishak, . and Teh Christopher Boon Sung, . and Mohamad Fakhri Ishak, . and Liew Yew Ann, . and Teh Christopher Boon Sung, . and Wan Rasidah Kadir, . and Rosazlin Abdullah, . (2013) Proceedings of the Soil Science Conference of Malaysia 2013 : good agriculture practices for soil health sustainability 16-18 April 2013 Bukit Gambang Resort City Kuantan Pahang. Malaysian Society of Soil Science, Selangor Malaysia. ISBN 978-967-9945-35-5
Jeyanny Vijayanathan, . and Goh Kah Joo, . and Umi Kalsom Md. Shah, . and Che Fauziah Ishak, . and Rosazlin Abdullah, . and Zulkefli Hashim, . and Zulkefli Malik, . (2009) Proceedings of the Soils Science Conference of Malaysia 2009 : soil health : preserving resources for sustainable agriculture. Malaysian Society of Soil Science, Sg. Buloh Selangor. ISBN 9.7896799453e+12