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. 2016 May 9;6:25739. doi: 10.1038/srep25739

Figure 4. Measurements of atom % abundance following the addition of labelled 15N fertilizer to timothy and meadow fescue grass plots located on a mineral site cultivated with a perennial bioenergy crop in eastern Finland.

Figure 4

The blue dots represent measurements made with a transparent chamber and the red dots with a dark chamber.