DATA SETSThese data sets are the results of experiments conducted by scientists who are investigating the Chinese brake fern and its application to phytoremediation of arsenic-contaminated soil.A. Method: Scientists collected brake fern plants from several uncontaminated sites and then planted them in pots containing soil. The soil contained 97 p.p.m. arsenic, and the brake fern plants were grown for 20 weeks. The concentration of arsenic was measured in the fern’s roots and fronds at various timepoints. The concentration of arsenic is expressed in p.p.m. The abbreviation p.p.m. stands for parts per million, or one milligram arsenic per kilogram of soil or plant.
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