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 |
Dentro del libro
Resultados 1-5 de 57
Página 1
... occurrence is a function of the ignition probability and prevalence of ignition sources , but fire be- havior ... occur in several distinct populations ? ( 2 ) Is the clearcut slash fuel population ( s ) statistically dif- ferent from ...
... occurrence is a function of the ignition probability and prevalence of ignition sources , but fire be- havior ... occur in several distinct populations ? ( 2 ) Is the clearcut slash fuel population ( s ) statistically dif- ferent from ...
Página 4
... occurred on more than one - half of the subplot thus making it unsuitable for regeneration . ( Only 0.3 percent of the subplots were rejected for these reasons . ) Information about the clearcut unit and the timber stand in which it was ...
... occurred on more than one - half of the subplot thus making it unsuitable for regeneration . ( Only 0.3 percent of the subplots were rejected for these reasons . ) Information about the clearcut unit and the timber stand in which it was ...
Página 9
... occurred in this study . In the mountain hemlock clearcuts , planted lodgepole pine was a minor regeneration component in terms of numbers but was classified as the dominant tree on 18.7 percent of stocked subplots -- the largest per ...
... occurred in this study . In the mountain hemlock clearcuts , planted lodgepole pine was a minor regeneration component in terms of numbers but was classified as the dominant tree on 18.7 percent of stocked subplots -- the largest per ...
Página 15
... occurred on 21 per- cent of the milacres because of their good distribution . As in the Cascades , the presence of 1- and 2 - year - old seedlings raised density levels but did not change stocking to any large extent . Their presence ...
... occurred on 21 per- cent of the milacres because of their good distribution . As in the Cascades , the presence of 1- and 2 - year - old seedlings raised density levels but did not change stocking to any large extent . Their presence ...
Página 17
... occurred as elevation increased , but an increasing amount of snow damage was observed at elevations above 5,300 feet . Dominant Species All six species found on these clearcuts were dominant on at least 7 percent of the stocked ...
... occurred as elevation increased , but an increasing amount of snow damage was observed at elevations above 5,300 feet . Dominant Species All six species found on these clearcuts were dominant on at least 7 percent of the stocked ...
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