Excerpt from Seed Production of Western White Pine Since the aim is to determine the amount of seed produced per unit of area, the best method of studying seed production is by means of sample areas. These areas, may be from one - quarter of an acre to one-half of an acre in extent, in accordance with the density of the stand. Each sample area, however, should include at least 100 trees of the principal species composing the stand. 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.