Nature reserve on coastal plain in western Australia; vegetation largely killed by Phytophthora cinnammomi; Photo: S.R. Shea.

Plate cultivation of Phytophthora cinnamomi from jarrah; Photo: Zentmyer

An early bronze age hill fort on the site of an earlier neolithic settlement

Experiment on effects of gases on tree growth?

Experiment on gases effects on tree growth

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

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

Defoliation and mortality in balsam fir. New Brunswick

Slash lopped to

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