Fig. 6: Soil inorganic Nitrogen concentration with annual progression of the outbreak.
From: Defoliation-induced changes in foliage quality may trigger broad-scale insect outbreaks
Fitted relationships for soil inorganic nitrogen (SIN) concentration and proportion of balsam fir, average tree defoliation and basal area, within a 5 m-radius. Shaded areas indicate 95% confidence intervals. The generalized linear mixed model was fitted on 1548 observations.
