Soil total Pb and some basic properties were determined using standard
methods recommended by the Chinese Society of Soil
Science (Lu, 1999). The soils had the following basic
properties: pH 7.93, organic matter 1.67%, Olsen-P 26.7
mg kg 1, cation exchange capacity (CEC) 16.7 cmol kg 1
and total Pb 283.1 mg kg 1.