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 3
... slope was 50 degrees with a windspeed of 8.0 kilometers per hour . A standard computer package , FIREMOD ( Albini 1976 ) , was used to obtain the baseline output values for the fire behavior variables of rate of spread , fireline ...
... slope was 50 degrees with a windspeed of 8.0 kilometers per hour . A standard computer package , FIREMOD ( Albini 1976 ) , was used to obtain the baseline output values for the fire behavior variables of rate of spread , fireline ...
Página 13
... slope . While the three models produce distinctly different spread predictions , the clearcut and partial cut model values are much less than those of the slash ( I ) model . Clearcut model predictions are about one - fourth , and ...
... slope . While the three models produce distinctly different spread predictions , the clearcut and partial cut model values are much less than those of the slash ( I ) model . Clearcut model predictions are about one - fourth , and ...
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... 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 ponderosa pine in clear- cuts below 5,300 feet where.
... 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 ponderosa pine in clear- cuts below 5,300 feet where.
Página 1
... slope , and time since harvest . Study Areas Stand structure and species composition of mixed conifer forests in eastern Oregon are extremely variable , depending upon site , logging history , insect and disease attacks , and wildfire ...
... slope , and time since harvest . Study Areas Stand structure and species composition of mixed conifer forests in eastern Oregon are extremely variable , depending upon site , logging history , insect and disease attacks , and wildfire ...
Página 2
... Slope ( percent ) 11.8 0-40 7.1 0-22 9.7 0-40 Age ( years ) 14.3 3-19 12.9 4-16 16.3 10-22 Mineral soil 25.5 2-60 27.3 5-75 10.3 0-40 Litter 19.9 5-40 31.5 2-50 45.9 13-75 Slash 22.1 11-45 16.1 6-26 18.5 10-30 Litter & slash 20.8 3-45 ...
... Slope ( percent ) 11.8 0-40 7.1 0-22 9.7 0-40 Age ( years ) 14.3 3-19 12.9 4-16 16.3 10-22 Mineral soil 25.5 2-60 27.3 5-75 10.3 0-40 Litter 19.9 5-40 31.5 2-50 45.9 13-75 Slash 22.1 11-45 16.1 6-26 18.5 10-30 Litter & slash 20.8 3-45 ...
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