Treesearch

Current techniques for integrating timber and deer management in coastal British Columbia and Alaska are reviewed and evaluated. Integration can be improved by setting objectives for deer habitat and timber, improving managers' knowledge of interactions, and providing planning tools to analyze alternative programs of forest management. A handbook designed to summarize relevant knowledge and assist planning in coastal British Columbia is described and examples of its contents are included.

Effects of tree age, month of cut, and height and angle of cut on sprouting of red alder stumps were evaluated in a study designed to develop an effective method for controlling red alder in Douglas-fir plantations. Ninety-five percent or more of alder stumps cut in June or July died by the end of the next growing season; mortality was 88, 70, and 22 percent for stumps cut in May, August, and September, respectively. Stumps of 4-year-old alder trees tended to have higher survival and taller sprouts than did stumps of 6- to 10-year-old trees. Height and angle of cutting had little influence...

The 2083-hectare Limestone Jags Research Natural Area in the White Mountains National Recreation Area of central Alaska contains old limestone terrain features––caves, natural bridges, disappearing streams, and cold springs in a subarctic setting. A limestone dissolution joint-type cave in the area is one of the largest reported in high-latitude North America. A Silurian limestone and an Ordovician volcanic and sedimentary sequence are in disconformable contact in the Research Natural Area (RNA); the limited stratigraphic break between the two units is evidence of a major drop in sea level...

A model of U.S. housing demand and supply was developed that projects housing starts for use in long-term forest planning. Housing demand was shown to respond to the current sale price and the user capital cost of housing and to the size and age composition of the population. Current sale price is determined in the new construction market. Supply of new construction was modeled and was shown to have a supply price elasticity of zero. The choice of housing type was shown to respond to the age of the householder and, in some age classes, to the price of housing services. Two projections of...

Describes the data, their sources, and the calibration procedures used in compiling a database for the Alaska IPASS (interactive policy analysis simulation system) model. Although this manual is for Alaska, it provides generic instructions for analysts preparing databases for other geographical areas.

Statistics are presented by county for western Oregon for four dominant land use classes on non-Federally owned land. The classes were primary forest, primary agriculture, low-density urban, and urban. Classes were determined from aerial photographs taken in 1971-74 and in 1982; by using these data, estimates of change for the period between photography were developed.

The impact of log defects on lumber recovery and the accuracy of cubic log scale deductions were evaluated from log scale and product recovery data for more than 3,000 logs. Lumber tally loss was estimated by comparing the lumber yield of sound logs to that of logs containing defects. The data were collected at several product recovery studies; they represent most of the major commercial softwood species in the Western United States. Defects listed in order of decreasing effect on lumber recovery are: multiple defects, ring shake, soft rot and voids, weather check, firm rot, breakage,...

A new procedure is presented for estimating carrying capacity (the number of animals of a given species that can be supported per unit area of habitat) on the basis of two simultaneous nutritional constraints. It requires specifying the quantity (bio-mass) and quality (chemical composition or digestibility) of available food and the nutritional requirements of the animal species. Its application is illustrated with an example involving black-tailed deer (Odocoileus hemionus sitkensis) in four forest habitats during summer and winter with three sets of snow conditions and two levels of...

The Budworm Model predicts the amounts of foliage destroyed annually by the western spruce budworm, Choristoneura occidentalis Freeman, in a forest stand. The model may be used independently, or it may be linked to the Stand Prognosis Model to simulate the dynamics of forest stands. Many processes that affect budworm population dynamics are simulated in detail, including budworm and host phenology, larval growth and feeding, larval and adult dispersal, and the effects of natural enemies. This publication describes the structure, assumptions, and default parameter values of the Budworm Model.

The 1978 inventory of the forest resources of Prince William Sound and Afognak Island was designed to produce estimates of timberland area, volumes of timber, and growth and mortality of timber. Estimates of timber resource quantities were also categorized by owner. Nearly 56 percent of the available timberland area is under Forest Service management, and almost 40 percent is held by private interests. Total available timberland area was estimated at 648,454 acres. Cubic-foot volume on this timberland was estimated at 2.93 billion cubic feet. Timber growth and mortality were estimated at...