Guidelines are offered for safe, effective fire treatments in western larch/Douglas-fir forests. Describes procedures for estimating and limiting the scorching of tree crows. Provides a method for predicting percentage of the forest floor that will be burned down to mineral soil.

Excerpt from Preliminary Guidelines for Prescribed Burning Under Standing Timber in Western Larch/Douglas-Fir Forests For many managers, understory burning is a new experience. Mistakes are often made during first attempts because some of the fire effects are not obvious at the time of the fire. In particular, the scorching of the crowns does not become apparent until days or even weeks after the fire. The fire may have all of the appearances of going nicely, only to show a severely scorched stand a few days later. The procedures de scribed for estimating the scorch are strongly recommended. Using these estimates the fire manager can adjust the fire as described and achieve the desired objectives with minimal damage to the stand. Ignoring these details will often lead to needless damage. Burning when the 0 to l-inch fuels are within the recommended range will yield fires that are effective and safe. Selecting a duff moisture content of the right value will give the added benefit of removing the desired amount of the duff layer. 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.

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.