Figure 3.
Mean patch nitrous oxide (N2O) concentration at 24, 48 and 96 h after addition of inorganic nitrogen (N) (NH 4 NO 3: closed symbols) or water (open symbols) for arbuscular mycorrhizal fungal access patches (AMF; solid lines) and no AMF access patches (nonAMF; dashed lines) shown over time. Error bars are ± SEM (n = 6). Asterisks represent a significant difference among treatments within each sample period (*, P < 0.05; **, P < 0.01) as determined using a two‐way ANOVA. Different letters within each sample timing represent significant differences between treatments for that sample timing (P < 0.05).