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Fig. 6. Mean concentration of (A) nitrogen, (B) phosphorus, and (C) zinc in the aboveground tissue of streambank wheatgrass collected from control and biosolids-amended post-fire study plots at the Buffalo Creek wildfire site. Thin bars represent the standard errors of the means (n = 4). Letters above the bars indicate significant differences between treatments within a year as indicated by a Fisher's least significant difference test.

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