Excerpt from Forty-Year Development of Douglas-Fir Stands Planted at Various Spacings During recent years, diameter and height growth of even the 100 largest trees per acre and total basal area and cubic volume growth per acre have all been substantially greater on the wider spacings. Furthermore, a great share of the total volume produced in the closer spacings is not merchantable. 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.