Treesearch

There currently exists no set of basic guidelines for Appalachian loggers to use in the decision making process for selecting the best way to harvest a tract of timber. Specifically, guidelines are needed for deciding between the alternatives of constructing truck haul roads to access an area or other alternatives such as skidding or forwarding timber longer distances, thereby limiting road construction costs. The results of this study indicate that several interrelated factors influence the choice of system to be used. These factors include road building costs, harvest volumes, skid...

Reported forest inventory statistics gathered by the USDA Forest Service, Southern Forest Experiment Station, Forest Inventory and Analysis (SOFIA) have been criticized because not all of the inventory volume reported is truly available for harvest. In response to this criticism, a procedure has been developed for assessing timber availability from reported inventory statistics for upland hardwood forests. The procedure uses forest inventory and ownership statistics gathered by SOFIA, a stump-to-mill cost prediction model developed by the USDA Forest Service, Northeastern Forest Experiment...

Contains abstracts and papers of oral and poster presentations on gypsy moth and other invasive species biology, molecular biology, ecology, impacts, and management presented at the annual U.S. Department of Agriculture interagency research forum on gypsy moth.

Large variations in timber harvesting cost and revenue can result from the differences between harvesting systems, the variable attributes of harvesting sites and timber stands, or changing product markets. Consequently, system and site specific estimates of production rates and costs are required to improve estimates of harvesting revenue. This paper describes computer software developed to help perform these tasks: ECOST, PROFIT-PC, THIN, and GB-SIM. The applications discussed provide information needed to identify appropriate harvesting technology for specific applications and provide...

When Lake States aspen tree canopy is removed by clearcut harvest, bird species turnover is almost complete. Bird species richness and total populations were highest in mature stands with well-developed understories and in regenerating stands about 4 years after clearcutting. However, species composition in regenerating stands was different to that in mature stands. Most bird species that are of regional concern were restricted to more mature stands. The lack of a direct relationship between species richness and increasing stand age was related to compensatory trends in species populations...

Describes four ecosystems in Minnesota and Michigan comprised of mature aspen stands on a range of soils from sandy to clay. The ecosystems are part of a long-term study of the effects of harvesting and species conversion on ecosystem properties. Presents data on geology, weather, soils, vegetation, litterfall, nitrogen dynamics, insects, disease, and wildlife.

Unevenage silvicultural practices can be used to regenerate and manage many eastern hardwood stands. Single-tree cutting methods are feasible in stands where a desirable shade tolerant commercial species can be regenerated following periodic harvests. A variety of partial harvest practices, including single-tree selection and diameterlimit cutting have been used for 30 years or more to manage central Appalachian hardwoods on the Fernow Experimental Forest, near Parsons, West Virginia. Results from these research areas are presented to help forest managers evaluate financial aspects of...

Twenty-five full-length papers and 19 poster papers on the interactions of different forest insect guilds with their host plants are presented in this proceedings, which is the result of an International Union of Forestry Research Organization Symposium that took place in Abakan, Siberia, U.S.S.R. in August 1989.

To properly classify or grade logs or trees, one must be able to correctly identify defect indicators and assess the effect of the underlying defect on possible end products. This guide assists the individual in identifying the surface defect indicator and shows the progressive stages of the defect throughout its development for yellow birch. Eleven types of external defect indicators and associated defects that are particularly difficult to evaluate are illustrated and described.