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.)

Fire origin D. fir, 95 yrs. old, Dbh 76cm; Site Index 150 (ft.). Located in Alsea area.

Beechwoods in Chilterns, on shallow over limestone

Beechwoods in Chilterns, on shallow over limestone.

Alpine meadow in spruce-fir forest, Paradise, Mt.Rainier.