White spruce nutrient intake over days

Correlation between two measurements (% and grams per day)

Graph showing change in available phosphorus with increase in pH values. Data from set of trials at Glendon Hall, U of T 1973.

Graph showing relationship between growth and Nitrogen content in plantation trees over rotation; data of Switzer, Smith & Nelson.

Comparison of shortwood and whole tree harvesting as perceived in the late 1960's.

Grapple loader. "in the maw of the logger". Pitt River, Jones Ops.

Grapple skidder, GLP (now Avenor).

Grapple yarder, Renfrew Div., B.C. Forest Products. Person on left is Vince Kerrio, Ontario Minister of Natural Resources.

Black and white photograph of a wooden clapboard structure, possibly a grave house located on III Concession Hamilton Township. The caption on the back of the photograph reads “Is this the grave house on the Main Road? that is mentioned as the Dean…