Effects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker
Copes, Donald L.
creator
Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
contributor
text
book
[Portland, Or.]
U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
[1985]
1985
ENG
Caption title.
Distributed to depository libraries in microfiche.
"October 1985."
Conifers
Douglas fir
Harvesting
Pruning
Seeds
Research note PNW, 431
https://www.biodiversitylibrary.org/bibliography/70764
14046734
10.5962/bhl.title.70764
GPO