Further details on tailing pond and statistical analyses.

<p>Supporting information for the manuscript contains additional information on tailing pond, tables reporting speciation distribution of heavy metals in soils of industrial squares and villages and Smoothed values w of heavy metal concentration index in farmland soil around Qingshan tailings pond from 2008 to 2016 (mg/kg). Pb content prediction and error, Exponential smooth number of soil heavy metal concentration with different coefficients a.</p> <p>(DOCX)</p>