Duff reduction by prescribed underburning in Douglas-fir.

David V. Sandberg

doi:10.2737/PNW-RP-272

Treesearch

Duff reduction by prescribed underburning in Douglas-fir.

Informally Refereed

Authors:

David V. Sandberg

Year:

1980

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-272

Source:

Res. Pap. PNW-RP-272. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 18 p

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Download (PDF 1.32 MB): https://research.fs.usda.gov/download/treesearch/21254.pdf

Abstract

Predictive equations for duff reduction and mineral soil exposure by prescribed fire are presented. An explanation is suggested for the dependence of duff combustion on surface fuel combustion. Surface fire duration and fuel moisture estimates of the National Fire-Danger Rating 1,000-hour timelag are the best predictors for reduction in moist duff. Duff layers with less than 30-percent moisture burned independently of surface fires.

Keywords

Duff, fire effects, prescribed burning, site preparation

Citation

Sandberg, David V. 1980. Duff reduction by prescribed underburning in Douglas-fir. Res. Pap. PNW-RP-272. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 18 p