Treesearch

Contemporary harvest planning software was used in planning the layout of cable logging units for a production study of the Clearwater Yarder in upstate New York. Planning software, including payload analysis and digital terrain models, allowed researchers to identify layout and yarding problems before the experiment. Analysis of proposed ground profiles pinpointed the need for constructed landings, and guidelines for rigging tail and lift trees, and helped define felling and bucking strategies to maximize payload. Considerations in unit layout and yarding strategy not considered by the...

Four West Virginia hardwood stands, managed using individual-tree selection for the past 30 years, were examined after the third and, in one instance, the fourth periodic harvest to determine the severity of logging damage. On existing skid roads, trees were removed with a rubber-tired skidder or a crawler tractor with a rubber-tired arch. Logging damage reduced residual stand basal area by 6%, a total of 6.1 ft2 per acre. Damage was concentrated in the saplings--85% of the stems lost to logging damage were less than 5.0 in dbh. An adequate number of undamaged stems in all diameter classes...

The second forest resource inventory of Nebraska showed a 25% decline in commercial forest area and 23% gain in growing-stock volume between 1955 and 1983.

Documents the biomass in 12 typical stands of puckerbrush and evaluates the feasibility of several potential systems to harvest these stands. Identifies areas of needed development for economically viable harvesting systems.

Restrictions on use of 2,4,5- T have created a need for herbicides that can be used for conifer release. Seven-year-old Norway spruce was released from competing vegetation with aerially applied Roundup. A wide spectrum of competing species were controlled and most hardwoods did not resprout during the 2-year evaluation period following treatment. Norway spruce appeared to respond to treatment and suffered negligible damage. Roundup as applied in this study appears to be a safe, effective herbicide that can be used to release Norway spruce.

The primary objective of this workshop was to discuss in detail the state- of-the-art of progeny testing. All aspects, from setting objectives through data collection and analysis, was be covered. We all know progeny testing is a highly technical phase of our tree improvement programs. Each task is critical and must be performed accurately and within a prescribed time schedule. The work must be closely supervised and coordinated to ensure objectives are achieved and that the plantations are established correct the first time. Anything less than a first-class job will result in suspect data...

This paper reviews the state of the art of surface mine reclamation for forestry in Pennsylvania, Maryland, West Virginia, Ohio, Indiana, and Illinois. Legislative constraints, socioeconomic issues, factors limiting the success of reforestation efforts, post-mining land-use trends, species options, and establishment techniques are discussed. Sources of assistance to landowners or managers are given and major publications on reclamation methods are cited. Information pruvided in the paper also applies to coal mining states adjacent to those listed above.

The purpose of this chapter is to describe a conceptual framework for understanding how trees grow and how they and other perennial plants defend themselves. The concept of compartmentalization has developed over many years, a synthesis of ideas from a number of investigators. It is derived from detailed studies of the gross morphology and cellular anatomy of the wood and bark of roots and stems in healthy angiosperms and gymnosperms. It is based on research in tree physiology and the chemistry of wood and bark. It is founded on observations of trees injured in the field by wind, snow,...

Neodiprion sertifer (Geoffroy) larval populations were treated with high and low doses of a nucleopolyhedrosis virus (NPV) product, Neochek-S. Larval population reduction due to Neochek-S was well over 90% in all sprayed plots 28 days after application, whereas overall protection of Pinus resinosa (Ait.) foliage was 94.0 ± 1.6%. The difference between doses was insignificant with respect to population reduction or foliage protection. A dose rate of 2.5 x 109 polyhedral inclusion bodies of N. sertifer NPV/ha, by ground application, provided acceptable control in a plantation infested with...

Analyses of black walnut tree diameters 13 years after planting showed that interplanting autumn-olive, black locust, and European alder increased walnut tree growtb, but only at certain locations. Interplanting autumn-olive resulted in increases of 56 to 351% at four of five locations and all species resulted in doubled walnut growth on an upland site. The interaction between treatment and location indicates that a fuller understanding of site and nurse species characteristics is needed to obtain the potential benefits of mixed plantings.