Life Sciences Commons^™

B800: Manual Thinning Of Northeastern Species Using Conventional Cutting Methods, Benjamin F. Hoffman Jr.

Bulletins

Harvesting small trees- 4-8 inches in diameter at breast height -has not been common in North America, but as average tree size declines, loggers must cut smaller stems. Many softwood stands in the Northeast contain 2000-4000 stems per acre with mean stand diameters of six inches or less (see Fig. 1). If diameter averages ten inches, there may be 6-7 trees per cord, but if it declines to six inches, loggers may handle four times as many trees for the same volume. Handling this increased number of pieces per unit requires changes in operating techniques.

Manual felling and limbing may …

A Test Of Concepts Inherent In Experience Based Setting Management For Outdoor Recreation Areas, Michael J. Manfredo, B. L. Driver, Perry J. Brown

Forest Management Faculty Publications

This study examines assumptions of the concepts which form the basis for experience based setting management of outdoor recreation areas. To test the assumptions a sample of wilderness users was surveyed and divided into experience groups based on differences in the specific experiences they desire. These experience groups were then tested for differences in their activity and setting preferences. The study was conducted at the Bridget Wilderness, the Fitzpatrick Wilderness, and the Popo Agie Primitive Area in Wyoming during 1978-79. Data were collected by questionnaire, and responses were examined by object cluster analysis to group users on the basis of …

Soil Response To Clearcutting And Site Preparation In East Texas, J. J. Stransky, L. K. Halls, Kenneth G. Watterston

Faculty Publications

On an east Texas forest site, clearcutting and site preparation did not change the soil pH. Chopping and KG blading significantly reduced organic matter in the surface soil, while burning slightly increased it. Organic matter showed a positive and significant relationship to potassium, calcium and magnesium. All site treatments increased phosphorus and potassium, with the greatest increase on the burned plots. Calcium and magnesium contents also increased with burning but decreased with KG blading. Burning appeared better than the other treatments for maintaining or improving the soil nutrient regime. However, planted loblolly pine seedlings survived and grew best with mechanical …

Southern Pine Beetle: Annotated Bibliography, 1868-1982, David Kulhavy, Paul C. Johnson

eBooks

The FAMULUS computerized literature retrieval system was used to produce an annotated bibliography for the southern pine beetle, Dendroctonus frontalis Zimmermann. The bibliography contains 1,235 citations and is cross indexed by AUTHOR, TAXONOMY and KEYS to subject areas.

Internal Filters : Prospects For Uv-Acclimation In Higher Plants, Martyn M. Caldwell, Ronald Robberecht, Stephan D. Flint

Green Canyon Environmental Research Area, Logan Utah

Wavelength-selective absorption of solar radiation within plant leaves allows penetration of visible radiation to the chloroplats, while removing much of the damaging ultraviolet-B radiation. Flavonoids are important in this wavelength-selective absorption. Induction of flavonoid synthesis by solar radiation, and specifically by UV-B radiation, is discussed as this relates to the potential acclimation of plants to enhanced solar UV-B radiation that would result from stratospheric ozone reduction.