Site Index and Height Growth Curves for Managed, Even-aged Stands of White Or Grand Fir East of the Cascades in Oregon and Washington, Volúmenes246-260Collin D. Bevins, Donald L. Reukema, John Neisess, Kenneth W. Seidel, M. A. Radwan, P. H. Cochran, Paul E. Aho, R. Dennis Harr, Richard E. Miller Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1978 - 21 páginas |
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Página 15
... associated with clearcut activities and the other with partial cut treatments . Both derived slash fuel populations are statistically different from the most similar non - slash fuel model currently used by the NFDRS , the Dense Conifer ...
... associated with clearcut activities and the other with partial cut treatments . Both derived slash fuel populations are statistically different from the most similar non - slash fuel model currently used by the NFDRS , the Dense Conifer ...
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... associated with more northerly aspects and less stocking with increasing amounts of grass . Other factors such as age , slope , and forbs had a positive or negative effect on stocking depending upon the species and community . Planting ...
... associated with more northerly aspects and less stocking with increasing amounts of grass . Other factors such as age , slope , and forbs had a positive or negative effect on stocking depending upon the species and community . Planting ...
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... associated with natural or artificial regeneration . Natural regeneration after clearcutting is an uncertain reforestation method because so many factors involved are beyond the forester's control . It is , therefore , most useful as a ...
... associated with natural or artificial regeneration . Natural regeneration after clearcutting is an uncertain reforestation method because so many factors involved are beyond the forester's control . It is , therefore , most useful as a ...
Página 1
... associated with the presence or absence of regeneration . Specific study objectives were : 1. To determine success of regeneration in terms of stocking percentage and density ( number per acre ) ; 2. To determine species com- position ...
... associated with the presence or absence of regeneration . Specific study objectives were : 1. To determine success of regeneration in terms of stocking percentage and density ( number per acre ) ; 2. To determine species com- position ...
Página 4
... associated environmental variables . Individual sample points were re- jected if conditions such as stream- beds , marshs , swamps , active roads , gravel , cinder pits , solid rock , or erosion occurred on more than one - half of the ...
... associated environmental variables . Individual sample points were re- jected if conditions such as stream- beds , marshs , swamps , active roads , gravel , cinder pits , solid rock , or erosion occurred on more than one - half of the ...
Términos y frases comunes
100 largest trees 50 percent atrazine average basal area Blue Mountains board-foot breast-high age calibration Cascade Range clearcuts conifer dead tops decay density diameter Douglas-fir equations estimated Forest and Range Forest Service fuel load fuel model grand fir height growth curves illus inches increases lodgepole pine logging mineral soil mixed conifer mountain hemlock National Forest natural regeneration NFDRS number of trees Oreg Oregon Pacific Northwest Pacific Northwest Forest partial cut peak flow percent of roadless planted ponderosa pine Portland postlogging programed harvest Range Exp Range Experiment Station reallocation regression road roadless area withdrawn sample seed seedlings Siskiyou National Forest slope spacing species Stocking percent streamflow study area study Forests subplots timber base timber harvest top-kill treatment period trees per acre tussock moth U.S. Department Umatilla Umatilla National Forest USDA values variables volume Washington watershed western white or grand Willamette National Forest