National Conference on Environment & Health : Sustainable Environment : Basic For Quality Lifestyle, Grand Riverview Hotel,, Kota Bharu, Kelantan (Malaysia), 29-30 Oct 2008
Proceedings of the Soil Science Conference of Malaysia 2007: Peat and Other Soil Factors in Crop Production: Sarawak (Malaysia), 17-19 Apr 2007, p. 327-330