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 4
... spacing . In clearcuts where plantation survival was high , regular rows of planted trees were clearly visible . Planted tree identification was less certain when survival was low , but counting whorls to check tree age helped to ...
... spacing . In clearcuts where plantation survival was high , regular rows of planted trees were clearly visible . Planted tree identification was less certain when survival was low , but counting whorls to check tree age helped to ...
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... spacing ( 681 trees per acre ) . Anal- ysis of the data showed there was a highly significant negative linear relationship between planted pon- derosa pine stocking percent or num- ber of trees and elevation ( fig . 3 ) . In addition to ...
... spacing ( 681 trees per acre ) . Anal- ysis of the data showed there was a highly significant negative linear relationship between planted pon- derosa pine stocking percent or num- ber of trees and elevation ( fig . 3 ) . In addition to ...
Página 21
... spacing to meet his objectives . At elevations below about 5,300 feet , ponderosa pine is clearly the preferred species to plant because its good survival and rapid growth rate result in full site utilization within a short period . In ...
... spacing to meet his objectives . At elevations below about 5,300 feet , ponderosa pine is clearly the preferred species to plant because its good survival and rapid growth rate result in full site utilization within a short period . In ...
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... spacing and the detrimental effects of carrying too many trees relative to the size to which they will be grown . Not only are trees larger , but yields per acre ... spacing . INTRODUCTION A Douglas - fir spacing trial established in 1925.
... spacing and the detrimental effects of carrying too many trees relative to the size to which they will be grown . Not only are trees larger , but yields per acre ... spacing . INTRODUCTION A Douglas - fir spacing trial established in 1925.
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... occupancy of the site and caused a further indirect loss in usable production . These trends indicate that differences -- in favor of wide spacings -- will continue to increase . Table 2 -- Distribution of mortality , by spacing and.
... occupancy of the site and caused a further indirect loss in usable production . These trends indicate that differences -- in favor of wide spacings -- will continue to increase . Table 2 -- Distribution of mortality , by spacing and.
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