Author: Susan N. LittlePublisher:
ISBN:
Category : Conifers
Languages : en
Pages : 36
Book Description
Predicting Duff Consumption from Prescribed Burns on Conifer Clearcuts in Western Oregon and Western Washington
Author: Susan N. LittlePublisher:
ISBN:
Category : Conifers
Languages : en
Pages : 36
Book Description
Woody Fuel and Duff Consumption by Prescribed Fire in Northern Idaho Mixed Conifer Logging Slash
Author: Publisher:
ISBN:
Category : Fuelwood
Languages : en
Pages : 28
Book Description
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.
First Order Fire Effects Model
Author: Elizabeth D. ReinhardtPublisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 72
Book Description
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.
Protecting and Enhancing America's Forests and Rangelands
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 228
Book Description
General Technical Report WO.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 432
Book Description
Research Paper PNW.
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 690
Book Description
Alabama's Forest Products Industry
Author: Publisher:
ISBN:
Category : Forest products industry
Languages : en
Pages : 690
Book Description
Temporal and Spatial Changes in Soil Carbon and Nitrogen After Clearcutting and Burning of an Old-growth Douglas-fir Forest
Author: Joseph A. AntosPublisher:
ISBN:
Category : Clearcutting
Languages : en
Pages : 28
Book Description
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.
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1260
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 510
Book Description