Table 3 Effect of age on hypothesis equations in Scots pine and Norway spruce. The p values and chi square (χ²) are listed. The p values with grey background are statistically significant (p < 0.05) based on LRT approach, which means age has a significant effect on the corresponding hypothesis equation

From: Age effect on tree structure and biomass allocation in Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies [L.] Karst.)