Now showing items 21-40 of 94

    • 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, ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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.
    • 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 ...
    • 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. ...
    • 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 ...
    • A Model for Assessing Hardwood Competition Effects on Yields of Loblolly Pine Plantations 

      Burkhart, Harold E.; Sprinz, Peter T. (Virginia Tech. Division of Forestry and Wildlife Resources, 1984)
      A model was developed to predict pine survival, growth and yield for unthinned loblolly pine plantations with varying levels of hardwood competition in the main canopy. Inputs for the model are number of loblolly pine trees ...
    • 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 ...
    • Growth and Yield of Appalachian Mixed Hardwoods After Thinning 

      Harrison, Wade C.; Burkhart, Harold E.; Burk, Thomas E.; Beck, Donald E. (Virginia Tech. Division of Forestry and Wildlife Resources, 1986)
      G-HAT (Growth of Hardwoods After Thinning) is a system of computer programs used to predict growth and yield of Appalachian mixed hardwoods after thinning. Given a tree list or stand table, along with inputs of stand age, ...
    • Simulation of Individual Tree Growth and Stand Development in Loblolly Pine Plantations on Cutover, Site-Prepared Areas 

      Burkhart, Harold E.; Farrar, Kenneth D.; Amateis, Ralph L.; Daniels, Richard F. (Virginia Tech. Division of Forestry and Wildlife Resources, 1987)
      A forest stand simulator, PTAEDA2, was developed to model growth in loblolly pine (Pinus taeda L.) plantations on cutover, site-prepared areas. Individual trees were used as the basic growth units. In PTAEDA2, trees are ...
    • Department of Forestry Annual Report 2003 

      College of Natural Resources; Department of Forestry (Department of Forestry, 2003)
    • The Virginia Geospatial Newsletter, Fall 2003 

      Forest Resources and Environmental Conservation; Virginia Cooperative Extension (VCE) (Virginia Tech, 2003)
      The purpose of the quarterly Virginia Geospatial Newsletter is to highlight innovative geospatial products and services throughout the Commonwealth and to widely disseminate geospatial knowledge and awareness throughout Virginia.
    • The Virginia Geospatial Newsletter, Spring 2004 

      Forest Resources and Environmental Conservation; Virginia Cooperative Extension (VCE) (Virginia Tech, 2004)
      The purpose of the quarterly Virginia Geospatial Newsletter is to highlight innovative geospatial products and services throughout the Commonwealth and to widely disseminate geospatial knowledge and awareness throughout Virginia.
    • The Virginia Geospatial Newsletter, Winter 2004 

      Forest Resources and Environmental Conservation; Virginia Cooperative Extension (VCE) (Virginia Tech, 2004)
      The purpose of the quarterly Virginia Geospatial Newsletter is to highlight innovative geospatial products and services throughout the Commonwealth and to widely disseminate geospatial knowledge and awareness throughout Virginia.
    • The Virginia Geospatial Newsletter, Summer 2004 

      Forest Resources and Environmental Conservation; Virginia Cooperative Extension (VCE) (Virginia Tech, 2004)
      The purpose of the quarterly Virginia Geospatial Newsletter is to highlight innovative geospatial products and services throughout the Commonwealth and to widely disseminate geospatial knowledge and awareness throughout Virginia.
    • Department of Forestry Annual Report 2005 

      College of Natural Resources; Department of Forestry (Department of Forestry, 2005)