Proceedings of the Soils Science Conference of Malaysia 2008: Sustaining Soil Ecosystems with Emphasis on Coastal Soils: Perak (Malaysia), 15-17 Apr 2008, p. 31-34
Proceedings of the Malaysian Society of Soil Science conference 2002 : applications of modern tools in agriculture: Perlis (Malaysia), 23-24 Apr 2002, p. 104-106
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