Treesearch

Exports have become an increasingly important part of the overall hardwood lumber market. However, recent findings indicate that much of the reported growth of hardwood lumber exports in the 1980's was based on inflated volume data. This paper presents new estimates of hardwood lumber exports to Asia and Europe with emphasis on the central hardwood region of the United States. The major finding is that, although the central region has become a major source of hardwood lumber, exporters in the eastern and western regions have a much larger share of the European and Asian markets.

Yields of different strains of shiitake mushrooms (Lentinus edodes) were evaluated when produced on small diameter oak logs in Ohio. Logs averaging between 3-4 inches in diameter were inoculated with four spawn strains in 1985.

From its inception during World War II, the wooden pallet industry has grown to become the Nation's largest industrial consumer of hardwood lumber products. Since most of the raw material in wooden pallets is lower grade lumber, the pallet industry's growth, efficiency, and changing raw material inputs must be of concern to the grade hardwood lumber industry, the fine-hardwood lumber-using sectors, and hardwood resource investors and managers.

In the past decade there has been an increase in the number of intrastate, state and regional programs aimed at encouraging forest resource based economic development in northeastern USA. These programs were aimed at deriving economic benefits from the large volume of mature forest resources in the region. The improvement of rura1 communities by creating job opportunities was seen as one of the primary benefits of the development programs, and they therefore focused attention on attracting firms and new manufacturing facilities. Most of these programs set the location of forest products...

Agricultural limestone was applied in varyious amounts to the surface of three 10-m square forested plots on Pea Vine Hill in Westmorland County, Pennsylvania; a fourth plot served as a control.

Fourteen years of streamflow and water quality data from the Leading Ridge Experimental Watersheds in central Pennsylvania were analyzed to determine the long-term impacts of a commercial forest harvest on stream water chemistry and nutrient loss.

A geographic information system (GIS) was used to project eight forest community types from a 1,190-acre (482-ha) intensively sampled area to an unsampled 19,887-acre (8,054-ha) adjacent area with similar environments on the Western Highland Rim of Tennessee. Both physiographic and vegetative parameters were used to distinguish, extrapolate, and map communities.

Studies to evaluate the impact of insects on the establishment of advance oak regeneration in Pennsylvania were initiated in 1989. The populations and species of insects feeding on germinating acorns and new seedlings, their activity periods, and the damage caused by these insects were studied in relation to overstory-density (40, 60, and 100 percent relative density) and understory vegetation control (herbicided and unherbicided) at three sites in the unglaciated Allegheny Pleteau in Clearfield County.

Allegheny hardwood stands in the Pennsylvania portion of the type frequently contain dense understories of undesirable species such as hayscented fern (Dennstaedtia punctilobula (Michx.) Moore), New York fern (Thelypteris noveboracensis L.), grasses and sedges (Carex spp.), striped maple (Acer pensylvanicum L.) and beech (Fagus grandifolia Ehrh.). Once established, they interfere with the establishment of advance regeneration of desirable species. The use of herbicides is a practical means of controlling undesirable species.

A clearcut in southern Michigan was planted to 2-0 northern red oak (Quercus rubra L.) seedlings in the spring of 1987. Four treatments included: control (clearcut harvest only), woody brush control, plastic tree seedling shelters 122 cm tall, and woody brush control plus tree seedling shelters.