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Service-life tests indicate that ponderosa pine fenceposts treated with preservatives performed well after field exposure of 30 years. Treating plants in the Black Hills area used commercial methods to treat the posts with creosote, pentachlorophenol, and waterborne arsenicals. Test sites were in the northern Great Plains-one in the semiarid western portion near Scenic, South Dakota, the other in the more humid eastern portion near Brookings. The annual service cost of the untreated posts ranged from $1.06 to $1.18 per post depending upon test plot location. The lowest annual cost of the treated posts was $0.85 per post.
Excerpt from Growth of Immature Stands of Ponderosa Pine in the Black Hills Combinations of the variables sampled can be determined by noting the locations of the entries in tables 4 to 9 (see pages 8 to Each plot was carefully checked for uniformity of density, age, and site index. None of the plots had been thinned or otherwise disturbed during the 20-year period preceding measurement. A complete inventory was made on each plot, and data were obtained for computing the past stand. All trees were bored to determine radial growth at breast height for the past 10 and 20 years. Heights were measured on a sample of the trees and past height growth was determined by boring. The site index of each plot was computed from soil and topography (myers and Van Deusen, 1960b)to avoid errors due to the effect of stand density on tree height. Average age of the main stand on each plot was determined; occasional small invaders in stands of low density were omitted. Dead trees were measured and classed as having died 0-10, 11-20, or 21+ years ago. Dead trees on permanent plots and in stands thinned at known dates were used as guides in estimating time of death. 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.