Recommendations for selection and management of seed orchards of western white pine
U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982 - Gardening - 7 pages
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500 catkin clusters Ammonium nitrate Bingham Bordelon bottom two whorls carbohydrate Coffen cone and pollen cone and seed cone maturation cone production cone ripening cones collected Cones per bushel conifers Cooperative Tree lmprovement COVER CROP Department of Agriculture effect on cone Empire Cooperative Tree Fertilizer-irrigation flower induction programs Forest and Range Forest Service ft by 20 genetic germination grass harvest Hedlin height of grafts Hoff irrigation lnland Empire Cooperative lntermountain Forest mechanical lift Moscow Arboretum Moscow grafts multiple tops number of cones Ogden old telephone wire pick cones Pinus monticola Dougl pollen clusters Pomar dwarf orchardgrass production in Pinus Pruned tree Range Experiment Station Rehfeldt Remove RODENT Sandpoint Seed Orchard seed insects seed loss Seed moisture seeds per pound single-stemmed trees stratification stratify seed tion top whorl reached Tree lmprovement Program U.S. Department Unpruned tree western white pine white pine cones white pine seed white pine type