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 11
... species ; .002 and .001 fraction odw , respectively . The needles of ponderosa pine and white pine , however , have an Se of .015 and .025 , 10 times higher than the bolewood . Because the needle component contributes 78.6 percent of ...
... species ; .002 and .001 fraction odw , respectively . The needles of ponderosa pine and white pine , however , have an Se of .015 and .025 , 10 times higher than the bolewood . Because the needle component contributes 78.6 percent of ...
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... species . At elevations below 5,300 feet , planted ponderosa pine was the dominant species because of its good survival and fast growth . Considerable amounts of vigorous true fir and mountain hemlock advance reproduction were present ...
... species . At elevations below 5,300 feet , planted ponderosa pine was the dominant species because of its good survival and fast growth . Considerable amounts of vigorous true fir and mountain hemlock advance reproduction were present ...
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... species to plant because of its greater resistance to snow damage . Planting stock should be used that was grown from seed col- lected in the same geographical and elevational zone as the clearcut . If sufficient numbers of vigorous ...
... species to plant because of its greater resistance to snow damage . Planting stock should be used that was grown from seed col- lected in the same geographical and elevational zone as the clearcut . If sufficient numbers of vigorous ...
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... Species Composition of Regeneration Dominant Species . · Relation of Present Stocking to Environmental Factors Prediction Equations . Blue Mountains Regeneration Stocking and Density Species Composition of Regeneration Dominant Species ...
... Species Composition of Regeneration Dominant Species . · Relation of Present Stocking to Environmental Factors Prediction Equations . Blue Mountains Regeneration Stocking and Density Species Composition of Regeneration Dominant Species ...
Página 1
... species growing in diverse environ- ments . During the 1950's and early 1960's , clearcutting was the primary method of harvesting timber in these forests . More recently , the shelter- wood system has been used to in- crease the ...
... species growing in diverse environ- ments . During the 1950's and early 1960's , clearcutting was the primary method of harvesting timber in these forests . More recently , the shelter- wood system has been used to in- crease 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