Douglas fir growth (measured through weight change over time) graph.

Experiment results

Relative growth rate percentage over a change in temperature

weight over time?, graph

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.