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. 2021 May 3;11:9447. doi: 10.1038/s41598-021-88839-8

Figure 7.

Figure 7

Significant soil chemical properties as defined by PC1 and PC2 in urban (orange) suburban (green) and rural (blue) forests for both interior and edge soils. Bars represent the mean (± 1 SE) of beech and yellow poplar soils combined (n = 6). Significant differences are denoted when letters above the bar (p < 0.05).