Treesearch

A practical guide to the management of northern hardwoods for timber production in New England and New York. Both even-aged management are considered, and specific treatments are prescribed for a range of stand conditions and management objectives.

Proceedings of a workshop co-sponsored by the USDA Forest Service, the State University of New York, and the Society of American Foresters. Presented were papers on the methodology of sample tree selection, tree biomass measurement, construction of biomass tables and estimation of their error, and combining the error of biomass tables with that of the sample plots or points. Also presented were papers on various aspects of biomass research currently being conducted in the United States, Canada, and abroad.

Presents information on the culture and management of trees that have value as components of wildlife habitat in the northern hardwood and associated types in New England. Background information is provided for choosing the most suitable trees for wildlife habitats and for estimat ing the impact of timber production. Suggestions are made for choosing the numbers of trees for a variety of common situations and for cultural procedures to enhance the value of trees as wildlife habitat. Hard and soft mast production is discussed, and guides for culture and management of mast are presented....

This is a statistical report on the first forest wildlife habitat survey of New Hampshire conducted in 1982-83 by the Forest Inventory, Analysis, and Economics Unit, Northeastern Forest Experiment Station, U.S. Department o f Agriculture, Broomall, Pennsylvania. Results are displayed in 58 tables covering forest area, ownership, land pattern, mast potential, standing dead and cavity trees, and understory woody-stemmed vegetation. Data are presented at county and/or unit and state levels of resolution.

During 1984, 187.3 million board feet (816,600 m?) of veneer logs were harvested from northeastern timberlands. In 1984, 30.5 more million board feet (133,000 m?) of veneer logs were harvested than in 1980 - the second consecutive 19-percent increase over the past two 4-year periods. Most of the veneer logs came from Maine, Maryland, New York, and Pennsylvania. The Northeast's manufacturers of veneer received 153.8 million board feet (670,600 m?) of veneer logs during 1984, 33.3 million board feet, or 28 percent, more than that received in 1980. The veneer mills in the Northeast generated...

Studies in uneven-aged management have concentrated on the determination of optimal steady-state diameter distribution harvest policies for single and mixed species stands. To find optimal transition harvests for irregular stands, either fixed endpoint or equilibrium endpoint constraints can be imposed after finite transition periods. Penalty function and gradient methods are presented to solve these problems. The methods are demonstrated with a stage-structured model for projecting stands that contain mixtures of California white fir (Abies concolor [Gord. & Glend.] Lindl. (Iowiana...

We compared pairing success of male Kirtland's Warblers (Dendroica kirtlandii) in different habitats to test the hypothesis that a lower proportion of males in marginal habitat are mated. Fewer than 60% of the males in marginal habitat were paired, but 95% of the males in suitable habitat were paired. We estimated the overall pairing success of the known breeding population at 85%. We could not estimate the number of females because the adult sex ratio is unknown, and an unknown proportion of Kirtland's Warblers are polygynous. The Kirtland's Warbler population was fairly constant from...

Eastern black walnut seedlings were planted on a 1.5 ? 1.5m spacing in the spring of 1976 and irrigated throughout the growing season. During the spring of 1977, forage plots consisting of Kentucky 31 tall fescue, orchard grass, or Kobe lespedeza measuring 1 m wide and 10.2 m long and centered on a row of trees, were established with and without irrigation. Soil-water relationships measured throughout the 1977 growing season demonstrated lower on the average in irrigated than in nonirrigated plots during drought periods. Differences were attributed to the greater physiological vigor, thus...