Dead Eucalyptus marginata (jarrah) on coast in western Australia due to Phytophthora cinnamomi; photo by S.R. Shea

Dead top of leader resulting from aphid attack. Black spruce, 2+0, aphid damage.

Debudded red pine to produce a knot-free lower log after several years of debudding. Nr. Dorset

Debudding of white spruce planted 1964 by evening grosbeaks. Veneer Hill Black Brook, J.D.Irving. Person is Alex Jablanczy.

Debudding of white spruce planted in 1964 by evening grosbeaks. Veneer Hill Black Brook, J.D.Irving. Person is Alex Jablanczy.

Decadent 120 yr old jack pine. Nimitz Twp. Chapleau

Decadent red pine, Quetico, Hilly Island, Lac LaCroix. Photo Orie Loucks

Deciduous forest, near Simcoe, Norfolk County. N.B. Tulip tree in the centre foreground.

Deep peat (sphagnum) in Leitch Township. Cochrane; profile part of study by Walter Stanek MScF (1961) U of T on physical properties of peats. Histosol, P, S, D.

Graph on the relation between fertilizers content and seedlings dry weight increase