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
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Página 13
... impacts on the hydrologic system may be more persistent than changes in evapotranspiration resulting from timber cutting . With only 5 years of postlogging streamflow data , we cannot accurately determine the rate at which increased ...
... impacts on the hydrologic system may be more persistent than changes in evapotranspiration resulting from timber cutting . With only 5 years of postlogging streamflow data , we cannot accurately determine the rate at which increased ...
Página 1
... impact of decay entering grand fir and Douglas - fir through tops killed by the tussock moth or secondary beetle attack up to 3 years after the infestation in the Blue Mountains ended . This assessment of pathology included frequency of ...
... impact of decay entering grand fir and Douglas - fir through tops killed by the tussock moth or secondary beetle attack up to 3 years after the infestation in the Blue Mountains ended . This assessment of pathology included frequency of ...
Página
... impact of mortality has been minor at wide spacings . close spacings , however , much mortality was the result of snow and ice damage , which affected groups of trees and created open- ings in the crown canopy . This has reduced ...
... impact of mortality has been minor at wide spacings . close spacings , however , much mortality was the result of snow and ice damage , which affected groups of trees and created open- ings in the crown canopy . This has reduced ...
Página 6
... impact of this mortality on growth and yield will be discussed later . Height and Site Quality Height at age 53 Average height of the 100 largest trees per acre ( 250 / ha ) , as well as the averages for all trees in the stand and for ...
... impact of this mortality on growth and yield will be discussed later . Height and Site Quality Height at age 53 Average height of the 100 largest trees per acre ( 250 / ha ) , as well as the averages for all trees in the stand and for ...
Página 16
... impact on total growth of having fewer trees than at 10 - ft spacing . Trends and culmination of growth Periodic annual growth ( p.a.i. ) of both total stands and the 100 largest trees per acre ( 250 / ha ) has been very erratic ( fig ...
... impact on total growth of having fewer trees than at 10 - ft spacing . Trends and culmination of growth Periodic annual growth ( p.a.i. ) of both total stands and the 100 largest trees per acre ( 250 / ha ) has been very erratic ( fig ...
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