Treesearch

THIS PAPER REPORTS a study of the amount of stain and decay that developed from increment-borer holes in five species of bottomland hardwoods. Though the 0.2-inch holes made by conventional borers are often considered insignificant, it appears that they may result in serious defect.

In studies involving the measurement and subsequent remeasurement of trees, such as CFI plots or siliviculture research plots, the trees are commonly identified by metal tags fastened to the trees by means of nails. In 1957 a study was begun to determine whether this practice would lead to dregrade or scalable defect in the trees.

Despite the presence of more than 500 native tree species in Puerto Rico, many efforts have been made to introduce pine. These attempts have been made because, compared to the native species, pine has a much wider accepted market and has the longer fiber necessary as a component of kraft papers. In addition pine produces higher yields on poor sites, and its silviculture and utilization are relatively simple. The latter two reasons alone would be sufficient on this island, where there is an abundance of degraded, abandoned agricultural land and a population almost completely lacking a...

But how about bolts from cull oaks on upland pine sites? Though a bolt operation in such material offers many difficulties, at least one Southern firm is currently trying it. That firm is Potlatch Forests, Inc., of Warren, Arkansas.

Proper management of any timber species or type requires valid estimates of volume from time to time. Tables 1 and 2 were constructed to meet this need for the expanding area of slash pine plantations in the middle coastal plain of Georgia and the Carolina Sandhills.

Second-growth yellow-poplar is reaching merchantable size in the Southern Appalachians in increasing quantities each year. Although the timber is young and logs are small, it produces lumber of sufficiently high quality to supply the needs of Carolina wood-using industries.

The Piedmont of southern Virginia and the Carolinas contains thousands of acres of pine-hardwood forests. The most widespread commercial timber type of the region is the shortleaf pine-hardwood type. The less extensive Virginia pine-hardwood type lies along the western edge of the Piedmont, but reaches its peak development in the adjacent Appalachian Mountain region (fig. 1). The natural forest succession in the Piedmont proceeds from pure pine to mixed pine-hardwood to nearly pure stands of the more tolerant hardwoods (6), and hardwood species gradually crowd out pine and dominate the...

These site index curves are based on 697 observations of height on age for white, northern red, southern red, scarlet, black, and chestnut oak in the Virginia- Carolina Piedmont and the Southern Appalachian Mountains.

Several years ago, the American Machine and Foundry Co. decided to conduct a comprehensive investigation in the field of cutting processes. The initial emphasis has been on circular sawing because of the product line of the company's DeWalt Division. As a nevessary antecedent to theoretical and experimental investigations, an extensive review of the literature on circular sawing was undertaken by Lubkin (1)2. Although considerable quantities of information are available on ripsawing, virtually no information was discovered on crosscut or miter sawing of wood. The later operations are...

Studies at the Stonevill Research Center1 have established 3 practical methods of estimating the ability of Midsouth soils to grow sweetgum (liquidambar styraciflua). The methods were developed from data collected from 104 sweetgum plots in the area mapped on the opposite page.