View of 150+yrs white pine south of Val d'Or about to be harvested, N.B. other species CIP Val d'Or.

View of 150+ yrs white pine south of Val d'Or about to be harvested, N.B. other species. CIP Val d'Or

Graph on nutrient intake and relative growth rates through time in 2yr Douglas fir

Change in dry weight and nutrient contents in Norway spruce through time

Graph on nutrient and relative growth rates in 2yr Douglas fir

Clearcut 1946, natural regeneration of Douglas fir at 20 yrs, thinned from 2430 to 510 trees/acre in 1965. Shawnigan Div. Macmillan Bloedel. Vancouver Island

Douglas fir relative growth rate through time (days)

250-year ponderosa pine with younger 54-year-old natural regeneration. Coconino National Forest. Flagstaff

Machine planted 2+0 jack pine 1969, at 2 yrs. N.B. heavy grass. Bastarache Lot, Bouctouche, J.D.Irving

Jack pine planted 1970; photo June 1973. Ryan Woods, J.D.Irving.