Figure 6. Total emergence and maximum height of Koeleria macrantha seedlings grown in soils collected from five sites in Montana and four sites in Romania, and in treatments with and without (±)-catechin.

(±)-Catechin had been added to the soil 12 days prior to sowing seeds, and the numbers below the bars show the concentration in the soil two days before adding seeds. Error bars show 1 SE and asterisks denote significant differences between treatments at a particular site as determined by separate t-tests. The analysis from the complete ANOVA model is presented in the results.