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. 2009 Jun 18;4(6):e5964. doi: 10.1371/journal.pone.0005964

Figure 2. Soil carbon and nitrogen concentrations in stands of three tree species.

Figure 2

Total soil (A) C, (B) N and (C and D) mineral N in stands of each species. Values are means±SE and letters denote significant differences among tree species (P = 0.05).