Treesearch

Maximum tree size and species composition are related to elevation on Mount Washington (disturbed by logging) and Mount Whiteface (uncut) in the White Mountains of New Hampshire. Species migrational trends and differences between the two mountains in species elevational limits indicate that both hardwoods and softwoods will move to higher elevations in areas where cutting and heavy disturbance are eliminated.

Variation in volume and weight was found among loaded log trucks even when such factors as truck type, logging job, and driver influence were eliminated. A load range of 10,000 pounds or 1,000 board feet was commonplace for the same truck, driver, and cutting site. Differences in log size, shape, weight, and species caused a major share of this variation. Yet, improvements such as higher stakes and proper log selection could increase average load size to legal load capacity. If the underloaded trucks in this study had been brought up do legal weight allowances, delivery costs would have...

As an aid to policy- and decision-making about future environmental problems, a panel of experts was asked to predict the probabilities of future events associated with natural-resource management, wildland-recreation management, environmental pollution, population-workforce-leisure, and urban environments. Though some of the predictions projected to the year 2050 may sound fantastic now, the authors think that some of thc events predicted may occur sooner than forecast.

A study to compare live-sawing with conventional grade-sawing of factory-grade 3 red oak sawlogs revealed that live-sawing results in substantial increases in production rate, overrun, log value per thousand board feet, and significant reduction in size of the breakeven log diameter.

To produce better pallets, the higher quality parts should be used in the more vulnerable positions in the pallet. To determine the feasibility of doing this, pallet parts cut from commonly used lumber mixes were graded into four quality levels. The distributions obtained indicate that sufficient numbers of high-quality parts can be cut from existing raw material to allow selective placement. Four species groups - eastern hardwood, southern pine, Douglas-fir, and a small amount of western hardwood - were included in the study.

A practical guide for the management of a sugarbush. Guidelines are established for the manipulation of stand density and stocking to promote the development of healthy vigorous trees with deep, wide crowns, the necessary attributes for highest possible yield of sugar-rich sap. Specific treatments are prescribed for sapling, poletimber and small sawtimber stands and a procedure is provided for testing a sugarbush for sweetness, to select trees for thinning.

Urban rehabilitation is a major market for wood flooring, but if wood flooring is to continue to be used to any great extent in urban rehabilitation, it must be made more acceptable to the building contractor and housing owner. Changes in distribution, supply, and pricing could make wood flooring more readily available; product modification could reduce its short-term costs; and other changes could make wood flooring more economical and compatible with present working methods.

One procedure in analyzing the responses to factors in an experiment is to construct profiles of the means. Profiles are plots of the sample means of each level of one factor at each level of one or more of the other factors in the experiment. The construction of these profiles and tests of hypotheses about the mean responses is called profile analysis. This paper discusses profile analysis and presents a computer program which produces profiles of the experimental means.

The meanings of 10 concepts that describe elements of natural outdoor environments were measured with the semantic differential technique. Each concept was evaluated on three factors of meaning - evaluation, potency, and activity. Sixty recreationists were surveyed from each of three user groups - campers, picnickers, and wilderness hikers. Similarities and differences were found in the way in which the groups perceived each other and elements of recreation environments. Study results should contribute toward a better understanding of the way in which people relate to outdoor environments...

In a greenhouse study the emergence, survival, and growth of seven species of pine were related to chemical and textural characteristics of 12 Kentucky spoils. The results identify three factors that may affect the establishment of direct-seeded pine on surface-mine spoils. First, fine-textured spoil material may restrict seedling emergence. Coarse-textured sandstones and hard shales may provide a better seedbed. Second, species vary in their response to chemical and physical characteristics of the spoil material. Loblolly and longleaf pine were adapted to a wide range of spoils. The...