Plant Association and Management Guide for the Ponderosa Pine, Doublas-fir, and Grand Fir Zones, Mt. Hood National Forest

摘要

Four main uses of associations are: Describing key environmental features of sites; Providing site specificity for understanding management experience and research results; Prescription of appropriate management activities to sites, based on better ability to predict site response to treatment; and a natural inventory system of land resources. This booklet provides a description of what has been commonly called the mixed conifer zone on the Mt. Hood National Forest. This area is environmentally diverse, leading to great differences in the productive potential of timber, wildlife and forage, and in responses to treatment. Careful attention to vegetation helps us understand environmental gradients and prescribe habitatspecific activities which consider the limitations and opportunities inherent to the site. Where particular environments exist in unusual geographic settings, knowledge of plant associations reduces the chances of making costly management mistakes or forgoing opportunities.