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. 2013 Jan 31;8(1):e55805. doi: 10.1371/journal.pone.0055805

Figure 1. Experimental setup and biomass data.

Figure 1

Planting scheme (a); shoot (b) and root mass in the poor top (c) and rich bottom layer (d); percentage belowground biomass at harvest (e), in Festuca rubra (Fr) and Plantago lanceolata (Pl) monocultures and mixtures. Horizontal lines in b–d show expected values for mixtures in case of competitive-equivalence (i.e., 50% of monocultures, or a relative yield of 0.5), and arrows depict the percentage deviation. Asterisks show significant differences between observed and expected values after t-tests. Data are means ± SE, N = 3–4. (*) P<0.06; * P<0.05; ** P<0.01; *** P<0.001.