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Unburnt Soil Pit near Sioux Lookout Soil type #60

Soild under woodland developed in gneiss, imperfectly drained. Photo: Roger Pitblado.

Profile to Show Discontinuity, i.e.c/D Horizons of Water-Laid Sand Over Gravel. Near Hinton. Spodosol, P, S, F, D.

Chlorosis of shoots at time of new shoot elongation. Plonski Forest natural stand.

Slash lopped to

Defoliation and mortality in balsam fir. New Brunswick

Ponderosa pine in open area, logged and with bark beetle damage. N.B. no regeneration. Near Princeton.

Table 1. Amount of nitrogen and phosphorus applied at four fertilizer levels used (Armson table 1)

Experiment on gases effects on tree growth

Experiment on effects of gases on tree growth?