Effects of AMF and AC treatments on the competition of <i>S. canadensis</i> (experiment 3).

<p>Competitive ability (as indicated by the aggressivity index) of <i>S. canadensis</i> as affected by AMF (AMF or No AMF) and activated carbon (AC or No AC) (experiment 3). A lower value for the index indicates greater competitive ability. Values are means ± SE. Means for No AC with different uppercase letters and means for AC with different lowercase letters are significantly different at <i>P</i><0.05. For comparison of paired bars (No AC vs. AC), asterisks indicate significant differences (*<0.05), and ns indicates not significant.