Fire Hazard From Precommercial Thinning Of Ponderosa Pine Classic Reprint PDF Download

Excerpt from Fall Rates of Prescribed Fire-Killed Ponderosa Pine Cumulative tree fall percentages were calculated by dividing the total number of trees that had fallen up to the end of a particular year by the number of dead trees. Not only did tree fall numbers increase over the 10-year study, but the number of dead trees also increased. This represented an increasing pool from which trees could fall. Annual fall rates were calculated by dividing the number of trees that came down in a year by the number of standing dead trees at the beginning of that year. For each year, the number of trees that could possibly fall (standing dead) was reduced by the num ber that previously fell and was increased by the number that recently died. Average annual fall rates for a particular seasonal treatment, scorch class, or size class were calculated by averaging annual tree fall rates over the length of the study. In the figures, mortality rates are shown along a time scale that is Year After Fire, whereas the cumulative tree fall percentages are shown along a more appropriate time scale, Year After Death. Be cause trees fell as a consequence of mortality, the Year After Death scale starts all trees at a point when they can begin falling. 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.