Now showing items 21-40 of 1262

    • Growing and Marketing Christmas Trees in Virginia 

      Vodak, M.C.; Leuschner, W.A.; Watson, A.E. (Virginia Tech. Division of Forestry and Wildlife Resources, 1984)
      The purpose of this report is to assist potential and existing Christmas tree growers in making investment decisions about small Christmas tree plantations by presenting cost and revenue data and analysis of financial ...
    • The Wildlife Management Planning Game: Instructions to Participants 

      Guynn, David C.; Sullivan, Alfred D. (Virginia Tech. Division of Forestry and Wildlife Resources, 1973-09)
      During the spring of 1971, a project was undertaken with the objective of constructing a unique simulation game that would be helpful in improving wildlife management planning. The game would be used primarily for inservice ...
    • Diameter Distributions and Yields of Natural Stands of Loblolly Pine 

      Burk, Thomas E.; Burkhart, Harold E. (Virginia Tech. Division of Forestry and Wildlife Resources, 1984)
      A diameter distribution yield model was developed based upon measurements of 117 0.1-acre temporary plots located in naturally regenerated loblolly pine stands in the Piedmont and Coastal Plain of Virginia and the Coastal ...
    • Yields and Size Class Distributions for Unthinned Loblolly Pine Plantations on Cutover Site-Prepared Lands 

      Amateis, Ralph L.; Burkhart, Harold E.; Knoebel, Bruce R.; Sprinz, Peter T. (Virginia Tech. Division of Forestry and Wildlife Resources, 1984)
      Data from plots established in unthinned loblolly pine plantations on cutover site-prepared lands were used to develop size class distribution and yield predictions. The data come from plantations of loblolly pine established ...
    • Cultural, Management and Economic Research Needed To Assist the Non-Industrial Private Forest Landowner in the Southeastern U.S. - a Problem Analysis - 

      McElwee, Robert L.; Hall, Otis F. (Virginia Tech. Division of Forestry and Wildlife Resources, 1982)
      Much attention has been directed in recent years to finding ways of increasing the productivity of private non-industrial forest land ownerships in the South. Justification for the interest directed towards this ownership ...
    • Pine Seedling Production in the South: A Problem Analysis 

      Johnson, Jon D.; Bramlett, Dave L.; Burns, Russell M.; Dierauf, Tom A.; McDonald, Steve E.; Stone, Jake M. (Virginia Tech. Division of Forestry and Wildlife Resources, 1982)
      The objective of this analysis is to identify southern pine seedling production problems that if alleviated would facilitate the increased production and "quality" of seedlings needed to meet projected demand in the southeast.
    • Diameter Distributions and Yields Of Thinned Loblolly Pine Plantations 

      Cao, Quang V.; Burkhart, Harold E.; Lemin, Ronald C., Jr. (Virginia Tech. Division of Forestry and Wildlife Resources, 1982)
      A growth and yield model for thinned loblolly pine plantations was developed using data from 128 0.2-acre permanent plots in the Virginia Piedmont and Coastal Plain. The Weibull function, used to characterize stand diameter ...
    • WEIBUL: A Program to Estimate Parameters of Forms of the Weibull Distribution Using Complete, Censored, and Truncated Data 

      Zutter, Bruce; Oderwald, Richard G.; Farrar, Robert M., Jr.; Murphy, Paul A. (Virginia Tech. Division of Forestry and Wildlife Resources, 1982)
      The Weibull distribution has been used in many areas of forestry research. Complete Weibull distributions have been used to describe individual tree mortality (Glover and Hool 1979), stand level mortality (Somers et al. ...
    • A Computer Program Package For Use With the Southern Pine Seed Orchard Inventory-Monitoring System 

      Merkle, Scott A.; Feret, Peter P.; Bramlett, David L.; Queijo, Donald L. (Virginia Tech. Division of Forestry and Wildlife Resources, 1982)
      Southern pine seed orchards covering more than 10,000 acres currently produce over 160,000 pounds of improved seed having a potential of 1 billion seedlings annually. By the year 2000, annual seed production · is expected ...
    • Equations for Estimating Above-Ground Phytomass in the Understory of Appalachian Oak Forests 

      Martin, Wayne L.; Sharik, Terry L.; Oderwald, Richard G.; Smith, David Wm. (Virginia Tech. Division of Forestry and Wildlife Resources, 1981)
      Regression equations were developed for estimating total aboveground phytomass for 17 tree and shrub species in the understory of second growth Appalachian oak forest stands in southwest Virginia. All possible combinations ...
    • A Comparison of Growth and Yield Prediction Models for Loblolly Pine 

      Burkhart, Harold E.; Cao, Quang V.; Ware, Kenneth D. (Virginia Tech. Division of Forestry and Wildlife Resources, 1981)
      The objective of the study reported here was to analyze published growth and yield systems for loblolly pine, characterizing the nature of the data on which the study was based, specifying what input information is needed, ...
    • An Analysis of Several Alternatives to Oil As an Industrial Fuel 

      Kluender, Richard A.; Reisinger, Thomas W.; Farrar, Kenneth D.; Stuart, William B. (Virginia Tech. Division of Forestry and Wildlife Resources, 1981-10)
      This paper presents an analysis of some significant factors that should be evaluated when considering alternatives to oil burning boilers. Managers contemplating using or increasing the use of wood for energy should find ...
    • Main Stem Green and Dry Weights of Red Oak, White Oak, and Maple In the Appalachian Region of Virginia 

      Oderwald, Richard G.; Yaussy, Daniel A. (Virginia Tech. Division of Forestry and Wildlife Resources, 1980)
      New emphasis has been placed on the weight of whole trees and portions of trees. Weight inventories and purchase of wood by weight are becoming increasingly common for saw logs as well as pulpwood. More information needs ...
    • Evaluation of Ranked Set Sampling for Estimating Shrub Phytomass in Appalachian Oak Forests 

      Martin, Wayne L.; Sharik, Terry L.; Oderwald, Richard G.; Smith, David Wm. (Virginia Tech. Division of Forestry and Wildlife Resources, 1980)
      Ranked set sampling was introduced by McIntyre (1952) in estimating pasture yields. As described by McIntyre, the ranked set sampling procedure is implemented by first selecting a set of n elements at random from a population, ...
    • Costs of Establishing Loblolly Pine Plantations In Virginia: Methodology and Estimates 

      Thompson, Emmett F.; Shores, Michael E.; Sullivan, Alfred D. (Virginia Tech. Division of Forestry and Wildlife Resources, 1973-02)
      Forest regeneration decisions are among the most important that foresters make. In many instances, the cost of regeneration may be the largest cost item incurred in producing a timber crop. Accordingly, information on the ...
    • The 1977 Virginia Outdoor Recreation Survey 

      Spittle, Gerald D.; Buhyoff, Gregory J.; Davy, John R., Jr.; McElwee, Robert L. (Virginia Tech. Division of Forestry and Wildlife Resources, 1978)
      The Virginia Commission of Outdoor Recreation coordinated through the Planning District Commissions an inventory of statewide recreation resources between April, 1977 and September, 1977. The School of Forestry and Wildlife ...
    • Methods for Modeling Individual Tree Growth and Stand Development in Seeded Loblolly Pine Stands 

      Daniels, Richard F.; Burkhart, Harold E.; Spittle, Gerald D.; Somers, Greg L. (Virginia Tech. Division of Forestry and Wildlife Resources, 1979)
      Methods were developed to model growth and development of seeded loblolly pine (Pinus taeda L.) stands, using individual trees as the basic growth units. Aggregated spatial patterns and individual tree sizes are generated ...
    • A Qualitative Analysis of The Southern Pine Beetle's Wildlife Impact 

      Maine, John D.; Leuschner, William A.; Tipton, Alan R. (Virginia Tech. Division of Forestry and Wildlife Resources, 1980)
      Wildlife's social value has long been known. Early attempts to place dollar values on wildlife were crude (Stains and Barkalow, 1951; Collins, 1959) and often incomprehensible. For example, Collins found that each deer ...
    • The 1977 Virginia Outdoor Recreation Demand Survey 

      Roggenbuck, Joseph W. (Virginia Tech. Division of Forestry and Wildlife Resources, 1978)
      Knowledge of the present and projected public demand for outdoor recreation is a key element in the planning of a comprehensive system of outdoor recreation opportunities throughout Virginia. Public preferences for outdoor ...
    • The 1977 Virginia Outdoor Recreation Needs Assessment 

      Roggenbuck, Joseph W. (Virginia Tech. Division of Forestry and Wildlife Resources, 1978)
      This outdoor recreation needs assessment booklet, published by the School of Forestry and Wildlife Resources, Virginia Polytechnic Institute and State University, in cooperation with the Virginia Commission of Outdoor ...