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 1
... soil series , and vegetation composition . Samples were collected by clipping leaves growing within the reach of deer , and collections were made in early morning when deer commonly feed . Samples were individually placed in plastic ...
... soil series , and vegetation composition . Samples were collected by clipping leaves growing within the reach of deer , and collections were made in early morning when deer commonly feed . Samples were individually placed in plastic ...
Página 2
... soils have thin A horizons low in fertility which grade into unweathered sand and gravel . A finer textured buried soil is found at a depth of 2 to 6 feet ( Larsen 1976 ) . BLUE MOUNTAINS Plant communities of the Blue Mountains of ...
... soils have thin A horizons low in fertility which grade into unweathered sand and gravel . A finer textured buried soil is found at a depth of 2 to 6 feet ( Larsen 1976 ) . BLUE MOUNTAINS Plant communities of the Blue Mountains of ...
Página 3
... soils of the grand fir / big huckleberry community are the Regosols ( Vitrandepts ) developed in the ash layer deposited from Mount Mazama or Glacier Peak . These are well - drained soils with silt loam A - C horizons over older buried ...
... soils of the grand fir / big huckleberry community are the Regosols ( Vitrandepts ) developed in the ash layer deposited from Mount Mazama or Glacier Peak . These are well - drained soils with silt loam A - C horizons over older buried ...
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... soil , litter , slash ) , degree of burn , understcry vegetation ( forbs , woody , grass ) , distance from subplot to timber edge , and presence or absence of animal damage . DATA ANALYSIS To illustrate the present degree of ...
... soil , litter , slash ) , degree of burn , understcry vegetation ( forbs , woody , grass ) , distance from subplot to timber edge , and presence or absence of animal damage . DATA ANALYSIS To illustrate the present degree of ...
Página 7
... soil surface . Stocking percent Number trees / acre Minimum stocking Percent Samples Proportion of total Minimum stocking Samples Proportion of total Number No./acre Number 2988 20 40 14 60 80 2495 20 40 60 0908 0.86 200 26 0.93 .50 400 ...
... soil surface . Stocking percent Number trees / acre Minimum stocking Percent Samples Proportion of total Minimum stocking Samples Proportion of total Number No./acre Number 2988 20 40 14 60 80 2495 20 40 60 0908 0.86 200 26 0.93 .50 400 ...
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