Proceeding of the Soil Science Conference of Malaysia 2005: advances in soil science for sustainable food production: Sungai Petani, Kedah (Malaysia), 12-13 Apr, 2005, p. 125-128
Proceeding of the Soil Science Conference of Malaysia 2005: advances in soil science for sustainable food production: Sungai Petani, Kedah (Malaysia), 12-13 Apr, 2005, p. 103-108