Figure 2

Correlations between nitrate concentrations in soil water five weeks after the start of the experiment and shoot (A), root (B), and spike biomass (C) of common wheat (all in g microcosm-1). (D) Effects of decomposer species richness (0, 1, 2, and 4 species) and soil management type (mineral versus organic fertilizer) on nitrate concentrations in soil water five weeks after establishment of the experiment. Significance levels: **P < 0.01; ***P < 0.001. Means ± 95% confidence intervals.