Foliar Uptake Exceeds Soil Contamination: Dominant Contribution of Bioavailable Atmospheric Trace Metals to Crop Accumulation.
Atmospheric deposition is a major source of trace metals (Cd, Cu, Pb, Zn, and As) to crops, yet the relative contributions of exposure pathways and soil metal pools are unclear. Using a two-year open-top chamber (OTC) field study and greenhouse experiments, combined with synchrotron radiation microscopic X-ray fluoresc...