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. 2018 Mar 15;9:338. doi: 10.3389/fpls.2018.00338

FIGURE 2.

FIGURE 2

Variations in soil C, N, and P stoichiometry at varying groundwater depths of 2.5, 4.5, and 11.0 m in 2015 (A,C,E,G,I,K) and 2016 (B,D,F,H,J,L) growing seasons. The vertical bars are standard deviations, and indicates significant difference at p < 0.05 level among the different groundwater depths.