Treesearch

This annual assessment of regional pulpwood production and receipts is based on a canvass of the pulpmills in the Northeast that use roundwood or wood residue as a basic raw material for paper, insulation board, and hardboard products. The report includes a discussion and tabular data on roundwood and manufacturing residues produced and received in 14 Northeastern States in 1982. This includes pulpwood production by state, county, and species group; pulpwood receipts from roundwood by state and species group; residue chip receipts by state and species group; production of whole-tree chips...

This program gives the log weight that the skidder can move and gives fuel consumption either in liters or gallons per turn. Slope of the skid trail, skidder weight, and skid distance must be entered into the program.

The national forests provide a substantial volume of firewood for America's households. The 17 national forest districts studied spent over $148,000 to provide over 25,000 personal-use firewood permits during the calendar year 1981; 86 percent of the permits were for freewood mostly in the form of dead or down wood. The remaining 14 percent were for greenwood sold either to households in the form of pickup load sales or through the sale of personal-size boundaries of marked timber. It cost the 17 districts almost $6.00 per permit to provide this service. The cost per permit varied by the...

Free-to-grow sapling-size, yellow-poplars of seedling origin outgrew similar black cherry and red oak in both dbh and total height (especially on good sites). Yellow-poplar consistently grew faster in dbh throughout the study, particularly on the better oak sites. Black cherry had an edge over yellow-poplar in total height during the early years of the study, but yellow-poplar began to outgrow black cherry about 5 and 10 years after clearcutting on the good and fair sites, respectively. Sugar maple did not respond to the annual release treatment. With the annual release techniques used in...

The value per M bf (thousand board feet) of the lumber sawed from Grade-3 logs, 8 to 11 inches in diameter, from thinnings was compared with that from a harvest of mature-stand cut. The species tested were red oak (Quercus rubra L.), yellow-poplar (Liriodendron tulipifera L.), and hard maple (Acer saccharum Marsh). The total lumber value for each species was greater for logs obtained from thinnings. The value per M bf of the lumber sawed from red oak and yellow-poplar logs from thinnings was significantly higher than that from mature stands.

This study reports the effects of low-level camping stress on vegetation in a remote site. South Big Garden Island in Penobscot Bay, Maine, was studied because (1) it had no prior recreational use; thus, comprehensive base line data could be obtained; and (2) the exact number of campers could be monitored throughout the study period. The continuous line-intercept method based on a single vegetation transect line was developed to monitor vegetation and ground cover changes over a 2-year-period. The low-level use (an average of 50 campers/year) that was recorded did not significantly reduce...

General models for predicting DIB/DOB ratios up the stem, applicable over wide geographic areas, have been developed for 10 important hardwood species. Results indicate that the ratios either decrease or remain constant up the stem. Methods for adjusting the general models to local conditions are presented. The prediction models can be used in conjunction with optical dendrometer measurements or stem taper equations to convert outside bark diameters to inside bark diameters.

Release rates of the aggregation attractants of the smaller European elm bark beetle, Scolytus multistriatus (Marsham), from laboratory-aged and field-aged Conrel and Hercon dispensers were monitored for 85 days by GLC analysis of cold-trapped volatiles. Both dispensers had relatively low and constant rates of decay for all three attractant components after an initial burst in emission rates. Within limits, the ratio of components released remained constant over time and at various temperatures.

A distance-independent, individual-tree diameter growth model was developed for managed, even-aged, upland oak stands. The 5-year basal-area growth of individual trees is first modeled as a function of dbh squared for given stands. Parameters from these models are then modeled as a function of mean stand diameter, percent stocking of the stand, and site index. A stochastic option for the overall model also was developed. Tests on data from managed stands revealed that the model performed well.

Codominant seedling-origin crop trees 25 to 39 feet tall in even-aged, precommercial-size hardwood stands were released in West Virginia. Trees were located on two sites: good oak site index 75 and fair oak site 63. Species studied were black cherry, sweet birch, and yellow-poplar. Three-year results indicated that the trees generally responded to release; the 3-year dbh growth of released trees was 0.2 to 0.4 inch greater than that of unreleased trees. Height growth did not increase.