Open AccessEffects of leader topping and branch pruning on efficiency of Douglas-fir cone harvesting with a tree shaker.
Author(s) -
D.L. Copes
Publication year - 1985
Publication title -
hathi trust digital library (the hathitrust research center)
Language(s) - English
Resource type - Reports
DOI - 10.2737/pnw-rn-431
Subject(s) - topping , shaker , douglas fir , pruning , tree (set theory) , mathematics , cone (formal languages) , horticulture , botany , biology , algorithm , combinatorics , physics , acoustics , vibration
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