2 edition of Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker found in the catalog.
Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker
Donald L. Copes
by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or.]
Written in English
|Statement||Donald L. Copes.|
|Series||Research note PNW -- 431.|
|Contributions||Pacific Northwest Forest and Range Experiment Station (Portland, Or.)|
|The Physical Object|
|Pagination||8 p. :|
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