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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Johnson, David W. (David Winslow), - Hawksworth, Frank G. (Frank Goode), - Hildebrand, D.M.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: abscission  application timing  Arceuthobium vaginatum  Colorado  ethephon  Parasitic plants  Pinus ponderosa  shoots  Weed control  
  2. By: Johnson, David W. (David Winslow),
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: application rate  application timing  Arceuthobium vaginatum  ethephon  Parasitic plants  Pinus ponderosa  Weed control  
  3. By: Johnson, David W. (David Winslow), - Hildebrand, D.M.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: application rate  application timing  Arceuthobium vaginatum  ethephon  Parasitic plants  Pinus ponderosa  Weed control  
  4. By: Johnson, David W. (David Winslow), - Hawksworth, Frank G. (Frank Goode),
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Arceuthobium vaginatum  ethephon  Parasitic plants  Pinus ponderosa  Weed control  
  5. By: Hawksworth, Frank G. (Frank Goode), - Geils, Brian W
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Arceuthobium vaginatum  Arizona  canopy  growth rate  height  Parasitic plants  Pinus ponderosa  site factors  spread  stand density