Treesearch

Most training in forest industry takes place on the job and is more effective in sawmilling than in logging. Many training programs for woods workers have been ineffective because the rewards of the work are insufficient to attract capable people, leaving the industry to operate in a secondary labor market. Some characteristics of the work and of the technology suggest a need for training of machine operators in the industry, but others do not. An upgrading of pay and working conditions might attract workers of higher quality, thus reducing the need for training. There is a need for...

Between 1947 and 1955, 15 plots were established in the Eastern United States to evaluate chestnut hybrids under forest conditions. During the 1978 field season these test plots were reassessed and all living chestnut trees critically examined. Ten percent of the 250 surviving hybrid chestnuts were blight resistant, and had the timber form and rapid growth of the American chestnut, Castanea dentata.

A model was developed to predict the weight of foliage at each age on a branch for a given whorl from undefoliated balsam fir (Abies balsamea (L.) Mill.). The normal weight of foliage by age classes can be compared to the weight of foliage remaining on a branch to estimate recent, annual defoliation by spruce budworm (Choristoneura fumiferana (Clem.)). One branch from each whorl was sampled in the top half of each of 22 balsam fir trees in New Hampshire and New Brunswick. The foliage was separated by age, ovendried, and weighed. A system of equations was developed to predict the total...

Municipal programs to suppress Dutch elm disease have had highly variable results. Performance as measured by tree mortality was unrelated to control strategies. Costs for control programs were 37 to 76 percent less than costs without control programs in the 15-year time-span of the study. Only those municipalities that conducted a high-performance program could be expected to retain 75 percent of their elms for more than 20 to 25 years. Communities that experienced the fewest elm losses had a well founded program, applied it conscientiously and sustained their efforts over the years.

A truck-mounted crane was used to yard and load timber from a 30-acre sale in a 140-acre watershed in the mountains of north-central West Virginia. A total logging cost, excluding road costs, of $44.35/M bm for logs delivered to a mill 20 miles away was comparable to that reported for wheeled skidders. Road costs with gravel would add $55/M bm, without gravel $26/M bm. Roads built to these standards held sediment production within the range (0.05 to 0.10 ton/acre/year) expected for undisturbed forested watersheds. Residual stand damage caused by this system was also comparable to other...

Discusses and analyzes fuelwood production in rural Minnesota from roundwood and primary wood-using mill residue. Compares production in 1975 with production in 1960 and 1970. Assesses outlook for future fuelwood production and potential impact on Minnesota's forest industry.

Discusses industrial roundwood production and forest industry trends in Michigan, Minnesota, and Wisconsin. Compares log and bolt production by state for several products and species and discusses primary wood-using mill residue and its use.

The fourth inventory of Minnesota's Northern Pine Unit shows a 28% increase in growing-stock inventory, but a 4% decrease in commercial forest area between 1962 and 1977. This report gives statistical highlights and contains detailed tables of forest area as well as timber volume, growth, mortality, ownership, and use.

The fourth inventory of Minnesota's Prairie Unit shows that although commercial forest area decreased 31.7% between 1962 and 1977, growing-stock volume increased 22%. This report gives statistical highlights and contains detailed tables of forest area as well as timber volume, growth, mortality, ownership, and use.

The fourth inventory of Minnesota's Central Hardwood Unit shows large gains in growing-stock and sawtimber volumes but a 17% decline in commercial forest area between 1962 and 1977. This report gives statistical highlights and contains detailed tables of forest area as well as timber volume, growth, mortality, ownership, and use.