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A Spacing Aid for Machine Planting

An experimental 70-acre plantation, in which the trees were set out at exact spacings, was established at the Petawawa Forest Experiment Station near Pembroke, Ontario. Owing to the size of the project, it was decided to plant by machine. The rows could be laid out at the proper interval without difficulty, but some means of controlling spacing within the rows was required. Since the operator's job was too exacting for him to watch a visible indicator, an audible signal was required. For this purpose, a mechanism which signaled the machine operator at appropriate intervals was developed.


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Author(s): W. M. Stiell

Publication: Tree Planters' Notes - Issue 33 (1958)