Treesearch

Annual water yield increased following the clearcutting of a mature aspen forest in years 1-9 and year 14 of subsequent aspen regrowth. Maximum increases of 85, 117, and 88 mm year-l occurred during the first 3 years of regrowth. Increases in streamflow volumes from snowmelt and early spring rains were minimal and more variable after harvest and regeneration. Most of the increases occurred during the leaf-on periods, but sporadic increases occurred during the fall-early winter recharge period as long as 15 years after harvest. Increases in water yield were best explained by changes in...

Linear regression formulae for predicting crown diameter as a function of stem diameter are presented for nine species found in 50- to 80-year-old mixed hardwood stands in north-central West Virginia. Generally, crown diameter was closely related to tolerance; more tolerant species had larger crowns.

Data from field studies and a prebunching cost simulator have been assembled and converted into a general equation that can be used to estimate the prebunching cost of the Radio Horse 9 winch. The methods can be used to estimate prebunching cost for bunching under the skyline corridor for swinging with cable systems, for bunching to skid trail edge to be picked up by a skidder or forwarder, or bunching to roadside for stand cleanings and firewood sales. Costs can be determined easily with a hand calculator. The equation can also be incorporated into larger stump-to-mill desktop and...

Relative change of several types of stem defects was studied over an 8-year period to determine the effects of crop-tree thinning on the development of tree quality. Special interest was given to changes in relative quality associated with defect indicators of crop trees compared to trees in unthinned plots. The relative quality classes of the crop trees went from "poor" to "medium" for red maple and "poor" to "good" for aspen. The oaks stayed in the poor classification and yellow-poplar remained unchanged in the medium classification. Results showed a decrease in the number of epicormic...

In 8- to 12-year-old Appalachian hardwood stands, crop trees were released by stem injecting competing trees with a 20 percent aqueous solution of glyphosate. Species released were black cherry, red oak, and sugar maple. Release treatments were (a) injection of all trees within a 5-foot radius of the crop tree bole and (b) injections of all trees whose crown touched the crop tree. Five-year diameter growth of all species was significantly increased by both release treatments, but height growth was not affected by either treatment. Survival of released crop trees was higher and crownclass...

An analytical report on the volume of wood used by the wood-turning industry in Maine, and the volume of timber from the state's timberlands that may be suitable for turnstock. Findings are based on the third forest resource survey of Maine timberlands, and an industry canvass of primary manufacturing mills using wood from Maine timberlands, both conducted in 1982. Presents the volume of turnstock consumed by Maine mills, the volume produced from Maine timberlands, the volume suitable to be harvested for turnstock, and changes over time.

Current and real prices of hardwood lumber and stumpage prices are discussed. Results show that inflation wiped out most of the apparent price increases in two major hardwood lumber markets. Stumpage prices also failed to increase in real terms for most species in Ohio. Current and real prices trends for eight major eastern species are shown for the period 1964 through 1985.

A matrix model, FIBER, has been developed to provide the forest manager with a means of simulating the management and growth of forest stands in the Northeast. Instructional material is presented for the management of even-aged and multi-aged spruce-fir, mixedwood, and northern hardwood stands. FIBER allows the user to simulate a range of silvicultural treatments for a variety of species compositions growing on different sites. The internal structure of the model is defined and explanations on the use of FIBER are offered. Examples of input, interim procedures, and final output are shown.

Sawmill effectiveness is crucial to the growth and development of wood industries among locales, states, regions, and countries. Productivity ratios, structural factors, and other indicators of economic performance were used to measure the relative productive efficiency of the grade hardwood lumber industries in Kentucky, Pennsylvania, and West Virginia. Despite undercapitalization, the industries' latent capacity and efficiency potential provide the base and make the prospect for socially desirable economic development a highly viable option in all three states.

Northern red oak site-index (SI) class is estimated using height and diameter of dominant and codominant trees for five Appalachian hardwood species. Methods for predicting total height as a function of diameter are presented. Because total height of 4- and 6-inch trees varies less than 5 feet for the three northern red oak SI classes, use trees that are at least 8 inches in d.b.h. when estimating site class.