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Correlation between T. aestivum shoot biomass and weeds shoot biomass within the same pot on sterilized A non-inoculated soil and B inoculated soil in the feedback phase. Spearman rank correlation coefficients and P-values are shown in the graphs. Filled symbols indicate the average T. aestivum shoot biomass in the absence of weeds; n = 32 for non-inoculated soils and n = 48 for inoculated soils.
