Tree Selection. Class 1A. Keen Ponderosa Pine Tree Classification. Fremont National Forest, Oregon. Photo by: Ray Filloon Date: June 1939 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Ray Filloon Collection; La Grande, Oregon. Image: Filloon-374 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect...
Topics: r6, fremontnationalforest, usda, stateandprivateforestry, treeselection, age, region6, class1a,...
Class 1A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8701 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope, 1903-1953....
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
Class 1A. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology, Portland Station Collection; La Grande, Oregon. Image: PS-231 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific...
Topics: fpkeen, divisionofforestinsectinvestigations, class1a, foresthealthprotection, usda,...
Class 1A and 1D. Tree Selection. Keen Ponderosa Pine Tree Classification. Photo by: F.P. Keen Date: September 1934 Credit: USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection. Collection: Bureau of Entomology Collection; La Grande, Oregon. Image: BUR-8700 To learn more about this photo collection see: Wickman, B.E., Torgersen, T.R. and Furniss, M.M. 2002. Photographic images and history of forest insect investigations on the Pacific Slope,...
Topics: divisionofforestinsectinvestigations, r6, usda, stateandprivateforestry, treeselection, age,...
