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Excerpt from General Technical Report, 1977-1978 Natural resource managers and researchers in Montana have found that existing for est cover-type classifications and site classifications have not been adequate for their needs. Forest cover-type classifications are based only on the current (often early successional) tree species. Thus, they often encompass a wide range of environmental conditions; for example, one cover type might include saplings on clearcut sites in one environment and 400-year-old climax forests in a totally different environment. More over, the cover type on a given site is always changing with advancing succession or sudden disturbance (such as fire, logging, insect damage, or windthrow). Existing site classifications are usually of limited value because they are in tended for use in a certain resource specialty. Also, they often have little relation to forest vegetation, even though the vegetation represents a detailed expression of the overall environment and is itself a primary object of management. 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.