Proceedings of the Soils Science Conference of Malaysia 2009 : soil health : preserving resources for sustainable agriculture: Kuala Terengganu, Terengganu, 13-15 April 2009, p. 66-69
Proceedings of the Soils Science Conference of Malaysia 2009 : Soil Health : Preserving Resources for Sustainable Agriculture: Terengganu (Malaysia), 13-15 Apr 2009, 110-114
Proceedings of the Soils Science Conference of Malaysia 2008 : Sustaining Soil Ecosystems with Emphasis on Coastal Soils: Perak (Malaysia), 15-17 April 2008, p. 79-82