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. 2020 Jan 4;42(9):3015–3033. doi: 10.1007/s10653-019-00499-w

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© The Author(s) 2020

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Fig. 2 — Selenium concentrations in maize grain and stover under different ranges of Se application rates in maize (Zea mays L.). The mid-line is the median. The box indicates interquartile range, while the whiskers show non-outlier range. The red lines show the lower critical limit of Se for humans