Treesearch

Forty baits were tested in buckets to attract the red oak borer, Enaphalodes rufulus (Haldeman). Only six beetles were caught. A low beetle population and above normal rainfall may have reduced the catch. However, many other cerambycids were trapped.

Data and methodology are provided for projecting basal area, diameter, volumes, and values by product for northern hardwood stands, and for determining the rate of return on stand improvement investments. The method is rapid, requires a minimum amount of information, and should prove useful for on-the-ground economic analyses.

Repeated timber utilization studies in Pennsylvania suggest that the recovery of growing-stock timber has improved over the years. Currently 95 percent of the inventory growing stock volume is being recovered from harvested trees. There are many opportunities to recover additional amounts of biomass from nongrowing-stock trees and logging residues. Until recently, these operations were regarded as unprofitable.

Time series analysis was used to develop a model that depicts pulpwood use in the Northeast. The model is useful in forecasting future pulpwood requirements (short term) or monitoring pulpwood-use activity in relation to past use patterns. The model predicted a downturn in use during 1980.

More biomass was present in 46-year-old cove hardwood than upland oak types on the West Virginia University Forest near Morgantown. Oak site index was a poor predictor of biomass yields.

A statistical report on the third forest survey of Pennsylvania conducted in 1977 and 1978. Statistical findings are based on data from remeasured 115-acre plots and both remeasured and new 10-point variable-radius plots. The current status of forestland area, timber volume, and annual growth and removals is presented. Timber products output by timber industries, based on a 1976 updated canvass of manufacturers, is presented.

Data being collected by The National River Recreation Study (NRRS) (U.S. Forest Service, St. Paul) includes origin-destination information for recreational visits to a variety of rivers nationwide. Such data are being collected over several years during a time of rapidly changing energy costs, economic conditions and consumer attitudes. This presents an opportunity to explain trends in river recreation demand. Methods of site choice and site demand analysis may be useful for this purpose. Appropriate mathematical models are defined and explained. It is shown how these models can be used to...

A trend may develop in which railroads become lifelines between rural and urban populations. For instance, the railroad along the Potomac River presently serves commuters from Washington's western suburbs. The railroad could be used to reclaim surface mined areas in the upper portion of the Potomac. These same lines can also open western Maryland as a recreation resource to Washington, D.C., residents. Multiple use of railroads is a trend recreationists would find beneficial.

Many northeastern Minnesota communities depend upon outdoor recreation activities and tourism for a substantial portion of their yearly cash inflow. While the recreation and tourism industry in the region has grown steady in recent years, it may prove to be less stable in the future than other industries, for at least two basic reasons: (1) while sociologists and recreation planners may dispute the assertion, outdoor recreation is considered by many a luxury or a nonessential activity and therefore subject to alteration of activity participation due to changing economic status of families...

In less than two decades, snowmobiling has changed from a novelty to a way of life for some 20,000,000 Canadian and American citizens of all ages. Why has snowmobiling continued to mushroom? Why did the challenges of inadequate safe use areas, public criticism and skepticism and primitive machines fail to doom the activity to a passing fad?