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Fig. 3. The Pbsoil and plant Pb uptake (Pbplant) in Brassica rapa (mustard) tissue analyzed by XRF. Mustards were grown in both the greenhouse (n = 4) and in situ in the test plots (n = 8). Each point represents an average of 2 to 4 Pbsoil measurements and 5 to 8 Pbplant measurements.
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