Graph on nutrient uptake rate through degree days in 1 yr White spruce

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

Graph on seedlings dry weight through time (days)

Graph on seedling dry weight (mg) through time (days) in Japanese larch (fertilized vs unfertilized)

Graph on nutrients uptake rate through time (difference between fertilized and unfertilized)

Fire origin D.fir 350yrs, Dbh 140cm.,Ht.61m.

Natural regen. of pine in Ceanothus bushes, SE Oregon Weyerhaeuser Tree Farm. N.B. Ceanothus fixes Nitrogen.

Open grown ponderosa pine with sage brush, nr. Vernon, Okanagan valley.

Alpine meadow on Mt.Rainier

General view of fire origin forest of D.fir, Site Index 170(ft.)