Treesearch

A number of Appalachian hardwood trees are ranked according to the following silvical characteristics: shade tolerands, development of epicormic branching, susceptibility to frost damage, diameter growth rate, and seed dormancy.

In a study of hardwood regeneration, experimental plots were treated to produce residual densities of 40, 60, 80, and 100 square feet of basal area per acre with 30, 45, and 60 percent sawtimber. After 9 years, numbers of stems and percent stocking were estimated for each species and they were rated for reproductive potential under different residual densities. Data from a 3-year-old patch cutting are given for comparison.

Provides a practical method of estimating subregional removals of timber and demonstrates its application to a typical problem. Stepwise multiple regression analysis is used to develop equations for estimating removals of softwood, hardwood, and all timber from selected characteristics of socioeconomic structure.

An automated rough mill layout has been designed for manufacturing interior furniture parts. Designed to reduce human decisions and mistakes that can be costly when converting lumber into parts, the mill is based on a manufacturing sequence in which lumber is first gangsaw-ripped into standard-width strips before being crosscut to remove defects and cut to specific lengths. It is also expected to reduce manpower requirements, provide coordinated materials handling, provide better production control, and ensure consistently good yields. Standardization to one or a few widths permits maximum...

The literature was reviewed for reports on nutrient cycling in the eastern deciduous forest, particularly with respect to nitrogen, and for effects of forest management on the nutrient cycle. Although most such research has dealt with conifers, a considerable body of literature relates to hardwoods. Usually, only those references that dealt quantitatively with nutrient cycling were cited. The nutrient content of the forest stand is a relatively small part of the total nutrient pool contained in soil. Under the present practices of harvesting stem wood on a 50- to 100-year rotation,...