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 62
Página 1
... determined by drying to constant weight in a forced - air oven at 65 ° C , and ash in the ground tissue was estimated by heating in platinum crucibles at 500 ° - 550 ° C for 4 hours . Hydrogen - ion concentration ( pH ) was determined ...
... determined by drying to constant weight in a forced - air oven at 65 ° C , and ash in the ground tissue was estimated by heating in platinum crucibles at 500 ° - 550 ° C for 4 hours . Hydrogen - ion concentration ( pH ) was determined ...
Página 1
... determined from a consensus of opinion rather than an analysis of fuel type range and variance ( Deeming and Brown 1972 ) . These difficulties were unavoidable due to lack of time before the 1972 implementation date . The NFDRS project ...
... determined from a consensus of opinion rather than an analysis of fuel type range and variance ( Deeming and Brown 1972 ) . These difficulties were unavoidable due to lack of time before the 1972 implementation date . The NFDRS project ...
Página 11
... determine the percentile fuel mois- ture values . The station has 2,067 days of weather data between June 1 and September 1 over a 22 - year period . The moisture contents ( percents ) at each danger level are given on the bottom of the ...
... determine the percentile fuel mois- ture values . The station has 2,067 days of weather data between June 1 and September 1 over a 22 - year period . The moisture contents ( percents ) at each danger level are given on the bottom of the ...
Página 14
... determined from only those fuels less than 2.54 - cm diameter . The use of such ' adjusted packing ratio ' values ... determine the packing ratio . n The The weighted load is the load value used by the fire model to derive reaction ...
... determined from only those fuels less than 2.54 - cm diameter . The use of such ' adjusted packing ratio ' values ... determine the packing ratio . n The The weighted load is the load value used by the fire model to derive reaction ...
Página 15
... determining packing ratios for the two models has the same effect as increasing the clearcut model's depth from 32.0 to 134.6 cm , and the partial cut depth from 15.0 to 81.9 cm . The fine fuels ' surface area - to- volume ratio is a ...
... determining packing ratios for the two models has the same effect as increasing the clearcut model's depth from 32.0 to 134.6 cm , and the partial cut depth from 15.0 to 81.9 cm . The fine fuels ' surface area - to- volume ratio is a ...
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