Publisher's Synopsis
Excerpt from Woody Fuel and Duff Consumption by Prescribed Fire in Northern Idaho Mixed Conifer Logging Slash
Because of these considerations, managers at tempt to remove specified amounts of fuel and also retain desired amounts of residual organic material. Consumption of fuels and retention of organic material can be described in several ways. Duff consumption is often described as depth reduction, percentage depth reduction, and percentage mineral soil exposure. For evaluating smoke emissions and nutrient capital, depth reduction is the appropriate expression because it describes actual amounts and can be converted to weight if duff bulk density is known. Percentage duff reduction is commonly used to describe fire prescription targets. It must be applied to preburn depth or loading to estimate actual amounts of duff removed or retained. Per centage mineral soil exposure relates to regenera tion potential, seedbed quality, and vulnerability to erosion. Objectives and constraints of prescribed fire can often be expressed as desired or acceptable levels of percentage mineral soil exposure.
Consumption of woody fuel is often described as percentage of preburn fuel quantities consumed, especially for evaluating prescribed fire effects and designing fire prescriptions. It may be pre dicted initially as average diameter reduction of woody pieces and then converted to percentage volume reduction or fuel loading reduction.
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