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Book Predicting Duff Consumption From Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington Classic Reprint

Download or read book Predicting Duff Consumption From Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington Classic Reprint written by Susan N. Little and published by Forgotten Books. This book was released on 2018-09-15 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Predicting Duff Consumption From Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington The amount of duff consumed during a prescribed burn depends on the moisture profile of the duff and on the amount and duration of heat from the burning woody fuel. Duff will burn independently of heat provided by burning woody fuel at a moisture content of 30 percent (shearer The amount of heat needed to draw off moisture to that level depends, of course, on how wet the duff is before ignition. If a dry layer exists on the surface, it may reduce heat penetration in the duff pro file, and duff consumption will be dependent on fire duration. 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.

Book Predicting Duff Composition from Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington

Download or read book Predicting Duff Composition from Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington written by Pacific Northwest Research Station (Portland, Or.) and published by . This book was released on 1986 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Woody Fuel and Duff Consumption by Prescribed Fire in Northern Idaho Mixed Conifer Logging Slash

Download or read book Woody Fuel and Duff Consumption by Prescribed Fire in Northern Idaho Mixed Conifer Logging Slash written by and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental burns were conducted on 36 plots in mixed conifer logging slash in northern Idaho to investigate consumption of duff and woody fuel. Prescribed fires were conducted in spring and fall, in YUM (yarded unmerchantable material) and non-YUM clearcuts and seedtree cuts. Preburn and postburn fuel loadings were measured, and fuel moistures were sampled shortly before burning. Preburn duff depth ranged from 1.2 to 2.6 inches. Preburn woody fuel loadings ranged from 28 to 86 tons/acre. Sixty-four percent of the duff was consumed. Most of the small woody fuel was consumed, along with an average of 15.5 tons/acre of large woody fuel. Postburn mineral soil exposure averaged 66 percent. Residual loading of large woody fuel averaged 31 tons/acre. Methods for predicting duff and woody fuel consumption are reported. For predicting percentage of duff reduced, the best independent variables were shallow duff moisture content and unit average diameter reduction of large woody material. For predicting duff depth reduction, the best independent variables were average duff moisture content and preburn duff depth. Diameter reduction of large woody fuel was best predicted using moisture content and average preburn diameter as independent variables. Guidelines are included for fire prescription development. These include recommendations for amounts of fuel to retain and to consume and discussion of tradeoffs in setting fire objectives. Equations are presented for computing moisture contents.

Book First Order Fire Effects Model

Download or read book First Order Fire Effects Model written by Elizabeth D. Reinhardt and published by . This book was released on 1997 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A First Order Fire Effects Model (FOFEM) was developed to predict the direct consequences of prescribed fire and wildfire. FOFEM computes duff and woody fuel consumption, smoke production, and fire-caused tree mortality for most forest and rangeland types in the United States. The model is available as a computer program for PC or Data General computer.

Book General Technical Report WO

Download or read book General Technical Report WO written by and published by . This book was released on 1975 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Research Paper PNW

Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Alabama s Forest Products Industry

Download or read book Alabama s Forest Products Industry written by and published by . This book was released on 1986 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Temporal and Spatial Changes in Soil Carbon and Nitrogen After Clearcutting and Burning of an Old growth Douglas fir Forest

Download or read book Temporal and Spatial Changes in Soil Carbon and Nitrogen After Clearcutting and Burning of an Old growth Douglas fir Forest written by Joseph A. Antos and published by . This book was released on 2003 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: We used 135 permanent plots (4 m2) nested within 15 blocks (121 m2) to quantify changes in concentration and spatial variation of carbon (C) and nitrogen (N) in the mineral soil (0- to 10-cm depth) after logging and broadcast burning of an old-growth, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forest. Before harvest, surface soils averaged total C of 7.2 percent, total N of 0.19 percent, extractable NH4 +-N of 5.2 Âg/g, extractable NO3 --N of 0.19 Âg/g, and pH of 5.3. Samples collected 9 months after burning showed a 26-percent decline in concentration of total C, but a 5-percent increase in concentration of total N. Concentrations of extractable mineral N (NH4 +-N + NO3 --N) increased to five time initial levels but returned to preharvest levels 1 year later. The coefficient of variation in extractable mineral N more than doubled after burning. Two and 3 years after burning, extractable N showed a significant and increasingly strong negative relation with plant biomass suggesting that N concentration was measurably reduced by plant uptake. Most variation in soil C and N before harvest occurred at small spatial scales (within and among 2- by 2-m plots); logging and broadcast burning had little effect on this pattern.

Book Monthly Catalogue United States Public Documents

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1987 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Publications of the Pacific Northwest Research Station

Download or read book Publications of the Pacific Northwest Research Station written by Pacific Northwest Research Station (Portland, Or.) and published by . This book was released on 1985 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Publications of the Pacific Northwest Forest and Range Experiment Station

Download or read book Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1985 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: