Tree Defects: A Photo GuideU.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1983 - Trees - 167 pages |
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acre age classes balsam fir bark black spruce Broomall cant chemical Choristoneura fumiferana column CONTROL CARD correlated DATA A1 data fields data set deer defoliation density Department of Agriculture DESIM Douglas-fir effects egg masses Entomol estimates evaluation feeding fertilization foliage quality Forest Experiment Station forest management Forestry genetic growth gypsy moth hardwood harvest headrig host increase infestation input table insect instar Job Control Deck larvae leaf levels machine maple monitoring nitrogen Northeastern Forest Experiment option outbreak output table parasitoids percent pest phenolic pheromone pine plant plots production red spruce resaw resistance response sampling unit sawmill SEMIVARIABLE simulated slash pine soil spray spruce budworm populations spruce-fir stands TABLE ENTRY TABLE-2 tannins techniques terpene tion tree mortality U.S. Department University USDA Forest Service variable volume weight western spruce budworm white spruce wood wounds