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 38
Página 3
... Trends of acid - detergent lignin were similar to those of the fiber . Lignin content for both collections averaged 11.67 percent of dry matter . Available carbohydrates . --Total available carbohydrates averaged over 11 percent in the ...
... Trends of acid - detergent lignin were similar to those of the fiber . Lignin content for both collections averaged 11.67 percent of dry matter . Available carbohydrates . --Total available carbohydrates averaged over 11 percent in the ...
Página 17
... trend in stocking 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 ...
... trend in stocking 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 ...
Página 21
... trend of succession to more shade tolerant species . In higher elevation clearcuts , lodge- pole pine is a desirable species to plant because of its greater resis- tance to snow damage . In the Blue Mountains , western larch appears to ...
... trend of succession to more shade tolerant species . In higher elevation clearcuts , lodge- pole pine is a desirable species to plant because of its greater resis- tance to snow damage . In the Blue Mountains , western larch appears to ...
Página 10
... trends in increases of annual yield are apparent at CC - 3 and CC - 2 ( fig . 6 ) . Several additional years data , however , will be necessary to evaluate these apparent trends . At CC - 1 , the expected downward trend may be masked by ...
... trends in increases of annual yield are apparent at CC - 3 and CC - 2 ( fig . 6 ) . Several additional years data , however , will be necessary to evaluate these apparent trends . At CC - 1 , the expected downward trend may be masked by ...
Página 17
... Trends After Logging Increases in size of peak flow must be examined in terms of their permanence as well as the size of peak flows that are increased . A double- mass analysis ( Searcy and Hardison 1960 ) of peak flow data was used to ...
... Trends After Logging Increases in size of peak flow must be examined in terms of their permanence as well as the size of peak flows that are increased . A double- mass analysis ( Searcy and Hardison 1960 ) of peak flow data was used to ...
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