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Browsing by Subject "Douglas fir -- Pruning -- Northwest, Pacific"

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Browsing by Subject "Douglas fir -- Pruning -- Northwest, Pacific"

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  • Developing sheared Douglas-fir Christmas trees 
    Oregon State University. Extension Service; Washington State University. Cooperative Extension; University of Idaho. Cooperative Extension Service; Douglass, Bernard S.; Sander, Gary H.; United States. Dept. of Agriculture ([Corvallis, Or.] : Oregon State University Extension Service ; [Pullman, Wash.] : Washington State University Cooperative Extension ; [Moscow, Idaho] : University of Idaho Cooperative Extension System ; [Washington, D.C.] : U.S. Dept. of Agriculture, 1982-10)
  • Developing sheared Douglas-fir Christmas trees 
    Oregon State University. Extension Service; Washington State University. Cooperative Extension; University of Idaho. Cooperative Extension Service; Proebsting, William M.; Landgren, Chal G.; United States. Dept. of Agriculture ([Corvallis, Or.] : Oregon State University Extension Service ; [Olympia, Wash.] : Washington State University Cooperative Extension ; [Moscow, Idaho] : University of Idaho Cooperative Extension Service ; [Washington, D.C.] : U.S. Dept. of Agriculture, 1987-06)
  • Developing sheared Douglas-fir Christmas trees 
    Proebsting, William M.; Landgren, Chal G.; Oregon State University. Extension Service; Washington State University. Cooperative Extension; University of Idaho. Cooperative Extension Service; United States. Dept. of Agriculture; Pacific Northwest Cooperative Extension ([Corvallis, Or.] : Oregon State University Extension Service ; [Pullman, Wash.] : Washington State University Cooperative Extension ; [Moscow, Idaho] : University of Idaho Cooperative Extension System ; [Washington, D.C.] : U.S. Dept. of Agriculture, 1992-03)
    Over the past 30 years, Christmas trees have become an intensively managed horticultural crop. During this period, higher standards and increasing competition have given the edge to growers who are progressive and highly ...

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