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Author : Michael G. Harrington
Publisher : Unknown
Page : 12 pages
File Size : 55,6 Mb
Release : 1996
Category : Ponderosa pine
ISBN : MINN:31951D02988587A
Author : Michael G. Harrington
Publisher : Unknown
Page : 7 pages
File Size : 41,9 Mb
Release : 1996
Category : Ponderosa pine
ISBN : OCLC:36002229
Prescribed underburning was carried out in autumn, late spring and mid-summer in a second-growth ponderosa pine (Pinus ponderosa) stand in southwestern Colorado. After burning, 526 trees with various amounts of crown scorch were tagged and surveyed annually for 10 years to evaluate mortality and subsequent tree fall. Of the 123 dead trees, 75% fell during the study. Tree fall rates were not significantly different between season of burning, or among trees 2-16 inch diameter at breast height. Trees that died with>80% crown scorch had about an 80% probability of falling within 10 years regardless of length of survival after injury. Trees that died with
Author : Michael G. Harrington
Publisher : Forgotten Books
Page : 20 pages
File Size : 43,9 Mb
Release : 2017-11-10
Category : Business & Economics
ISBN : 0260737879
Excerpt from Fall Rates of Prescribed Fire-Killed Ponderosa Pine Cumulative tree fall percentages were calculated by dividing the total number of trees that had fallen up to the end of a particular year by the number of dead trees. Not only did tree fall numbers increase over the 10-year study, but the number of dead trees also increased. This represented an increasing pool from which trees could fall. Annual fall rates were calculated by dividing the number of trees that came down in a year by the number of standing dead trees at the beginning of that year. For each year, the number of trees that could possibly fall (standing dead) was reduced by the num ber that previously fell and was increased by the number that recently died. Average annual fall rates for a particular seasonal treatment, scorch class, or size class were calculated by averaging annual tree fall rates over the length of the study. In the figures, mortality rates are shown along a time scale that is Year After Fire, whereas the cumulative tree fall percentages are shown along a more appropriate time scale, Year After Death. Be cause trees fell as a consequence of mortality, the Year After Death scale starts all trees at a point when they can begin falling. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : James F. Fowler
Publisher : Unknown
Page : 32 pages
File Size : 54,8 Mb
Release : 2004
Category : Douglas fir
ISBN : MINN:31951D03001269I
This review focused on the primary literature that described, modeled, or predicted the probability of postfire mortality in ponderosa pine (Pinus ponderosa) and Douglas-fir (Pseudotsuga menziesii). The methods and measurements that were used to predict postfire tree death tended to fall into two general categories: those focusing on measuring important aspects of fire behavior, the indirect but ultimate cause of mortality; and those focusing on tissue damage due to fire, the direct effect of fire on plant organs. Of the methods reviewed in this paper, crown scorch volume was the most effective, easiest to use, and most popular measurement in predicting postfire mortality in both conifer species. In addition to this direct measure of foliage damage, several studies showed the importance and utility of adding a measurement of stem (bole) damage. There is no clear method of choice for this, but direct assessment of cambium condition near the tree base is widely used in Douglas-fir. Only two ponderosa pine studies directly measured fine root biomass changes due to fire, but they did not use these measurements to predict postfire mortality. Indirect measures of fire behavior such as ground char classes may be the most practical choice for measuring root damage. This review did not find clear postfire survivability differences between the two species. The literature also does not show a consistent use of terminology; we propose a standard set of terms and their definitions.
Author : Anonim
Publisher : Unknown
Page : 582 pages
File Size : 42,9 Mb
Release : 1995
Category : Forests and forestry
ISBN : UOM:39015049373718
Author : Bruce Leigh Welch,David N. Cole,Dennis M. Cole,Douglas McEwen,Gary Ketcheson,Robert E. Keane
Publisher : Unknown
Page : 284 pages
File Size : 44,7 Mb
Release : 1966
Category : Boundary Waters Canoe Area (Minn.)
ISBN : OSU:32435058419029
Author : Bruce Leigh Welch
Publisher : Unknown
Page : 658 pages
File Size : 55,6 Mb
Release : 1994
Category : Sagebrush
ISBN : STANFORD:36105110631707
Author : Stephen S. Sackett
Publisher : Unknown
Page : 8 pages
File Size : 45,8 Mb
Release : 1984
Category : Forest regeneration
ISBN : MINN:31951D02996064A
Author : Anonim
Publisher : Unknown
Page : 256 pages
File Size : 41,5 Mb
Release : 1985
Category : Forests and forestry
ISBN : CUB:U183029135474
Author : Anonim
Publisher : Unknown
Page : 740 pages
File Size : 55,7 Mb
Release : 2000
Category : Forests and forestry
ISBN : CORNELL:31924089488443
Author : Anonim
Publisher : Unknown
Page : 88 pages
File Size : 48,8 Mb
Release : 1996
Category : Biomass energy
ISBN : UFL:31262090675439
Author : Leonard F. DeBano,Daniel G. Neary,Peter F. Ffolliott
Publisher : John Wiley & Sons
Page : 356 pages
File Size : 49,6 Mb
Release : 1998-03-09
Category : Science
ISBN : 0471163562
A comprehensive exploration of the effects of fires--in forests and other environments--on soils, watersheds, vegetation, air and cultural resources.
Author : Anonim
Publisher : Unknown
Page : 966 pages
File Size : 50,6 Mb
Release : 2002
Category : Coarse woody debris
ISBN : MINN:31951D02974717D
Author : Anonim
Publisher : Unknown
Page : 842 pages
File Size : 41,5 Mb
Release : 1998
Category : Forests and forestry
ISBN : UCBK:C094333533
Author : Bruce M. Kilgore
Publisher : Unknown
Page : 48 pages
File Size : 42,9 Mb
Release : 1987
Category : Abies grandis
ISBN : UIUC:30112104113284
Summarizes the objectives, prescriptions, and techniques used in prescribed burning beneath the canopy of ponderosa pine stands, and stands of ponderosa pine mixed with western larch, Douglas-fir, and grand fir. Information was derived from 12 districts in two USDA Forest Service Regions and seven National Forests in Montana and Oregon.
