In 1951, SFTIC began a pine seed-source study throughout the South. As part of this study, the Northeastern Forest Experiment Station established, between 1953 and 1958, a loblolly pine plantation in eastern Maryland and some shortleaf pine plantations in south-central Pennsylvania and southern New Jersey. Each plantation contained seedlings from several geographic sources. This report describes the results obtained from measurements made between the 1967 and 1968 growing seasons in these plantations.

Excerpt from Loblolly Pine Seed Trees: Selection, Fruitfulness, and Mortality Winter logging so that all seeds will be available. Protection of seedlings present in the uncut stand. Seedbed preparation to improve germination, or hardwood control to reduce competition. 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.

Excerpt from Loblolly Pine Seed Tree Mortality, Vol. 6 The 8 best seed-producing pines, or one-quarter of the pine stands, were left to reseed each acre when the timber was harvested from mature stands. Crawler tractors were used in logging. Cultural operations designed to improve the seedbed and reduce competition from undesirable plants were used on some of the areas. One-half of the logged areas were burned and one quarter disked to improve the seedbed. Some seed trees were injured during the logging and in the burning operations. Eight percent of the seed trees were severely damaged in logging and 5 percent of the injured trees died. A record of mortality showed that less than 1 percent of the seed trees died per year for all seed-tree areas during the average regeneration period of years. The increased seed-tree mortality due to the burning treatment was approximately equal to the average lightning mortality for the period. A number of trees died with no external evidence of injury. Lightning and wind caused over half the mortality during the period the trees had to stand to re seed the area. 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.