Table 5 F values and significance as results of the analysis of variance including ring and provenance factors and their interaction as sources of variation, calculated for each microdensity variable (width = ring width; m = mean ring density; mi = minimum ring density; ma = maximum ring density; rsd = ring density standard deviation) and for the ring porosity index

Ring

^c

^c

^c

^c

^c

^c

Provenance

ns

^c

^c

^c

^c

^c

Ring × provenance

ns

ns

ns

ns

ns

ns