Treesearch

Sawmill production managers often find it hard to tell what sawing pattern will yield the most. If sample logs are sawed in one sawing pattern, they cannot be reassembled and sawed again in a different pattern. And if a new sample of logs is used for each new sawing pattern, it is hard to tell if differences in yield are due to the sawing patterns or are due to natural differences between the logs in the samples. But by using a computer to simulate the sawing, the same log sample can be sawed again and again, and yields of the different sawing patterns can be compared. This paper has been...

The even-aged hardwood forest, with a poorly balanced distribution of age-classes, can cause perplexing problems during the first rotation. What is the best cutting strategy to follow? By using linear programming, we developed some cutting strategies that maximize board-foot production and produce a balanced age distribution by the end of the first rotation. We developed the strategies for four hypothetical northern hardwood forests with different unbalanced age distributions. Although these strategies may be used for forest lands with conditions similar to those assumed in this study, we...

In 1948 a study of uneven-aged forest management, with individual tree-selection cuttings, was begun on two 31-acre stands of Appalachian hardwoods in West Virginia. Now, after 20 years, these stands are beginning to show how this kind of management affects growth, yield, and species composition.

This it the fourth in a series of reports dealing with mine-spoil revegetation research in the Anthracite Region of Pennsylvania.

One way to treay a timber stand is to ignore it--simply let it grow. This treatment will in time produce usable timber. And this is how many small woodlands in the Northeast are treated today. The question is: How well does this treatment work in returning a profit to the owner? As a guide for forest managers, the Northeastern Forest Experiment Station has made an economic study of this let-it-grow treatment. We found that the profitability of this treatment depends mainly upon the age of the stand and the timber markets available.

In the steep terrain of the Appalachian Mountains much damage to forest streams is caused by erosion on logging roads. Muddy water that is unsuitable for fish, swimming, or human consumption often can be traced to these eroding roads. This paper has been prepared to sum up what land managers know about preventing and controlling erosion on logging roads in the Appalachians.

Yellow-poplar, like the other desirable hardwoods, is attacked by a variety of insects. However, only four species of insects are considered economically important: the tuliptree scale, the yellow-poplar weevil, the root-collar borer, and the Columbian timber beetle. These are native enemies of yellow-poplar (Liriodendvon tzllipifera L.) wherever the tree grows.

A summary of current information presented at the Society of American Foresters annual meeting at Philadelphia, Pa., October 1968.

This report was prepared to answer some of the questions that sawmill operators have about the mine-timber business in the Appalachian coal region.

This paper briefly reviews the quality-index concept, presents log-quality index tables for a selected group of eastern hardwood tree species, and explains how timber operators can use Q.I. for evaluating the lumber that can be sawed from logs and trees.