Topsoil samples developed on basalt parent material are widely exposed in Segamat, Johor and Kuantan, Pahang, whereas topsoil samples developed from serpentinite parent material widely exposed in Telupid and Ranau, Sabah. The topsoil were analysed for Co, Cr, Cu, Pb, Ni and Zn content. The values were compared to the threshold concentrations which indicate the permissable level of heavy metal concentration in soils.

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