Now showing items 1-20 of 78913

    • Conservation Agriculture Increases Yields and Economic Returns of Potato, Forage, and Grain Systems of the Andes 

      Mosquera, V. H. Barrera; Delgado, J. A.; Alwang, Jeffrey; Escudero Lopez, L. O.; Cartagena Ayala, Y. E.; Dominguez Andrade, J. M.; D'Adamo, R. (2019-11)
      Physical and environmental vulnerability analysis conducted for the Illangama watershed located in Ecuador's Andean highlands, shows deteriorated soil quality and declining crop productivity. These problems are caused by ...
    • Predictions of ruminal outflow of essential amino acids in dairy cattle 

      Fleming, A. J.; Lapierre, H.; White, R. R.; Tran, H.; Kononoff, P. J.; Martineau, R.; Weiss, W. P.; Hanigan, M. D. (2019-12)
      The objective of this work was to update and evaluate predictions of essential AA (EAA) outflows from the rumen. The model was constructed based on previously derived equations for rumen-undegradable (RUP), microbial (MiCP), ...
    • Implications of two different methods for analyzing total dietary fiber in foods for food composition databases 

      Phillips, Katherine M.; Haytowitz, David B.; Pehrsson, Pamela R. (2019-12)
      Since 1989, total dietary fiber values in USDA databases were determined by the enzymatic-gravimetric (EGF) method (AOAC 991.43), where "fiber" is the residue remaining after samples are subjected to enzymatic treatments ...
    • Quantifying Hydrological Impacts of Climate Change Uncertainties on a Watershed in Northern Virginia 

      Baran, Ayden A.; Moglen, Glenn E.; Godrej, Adil N. (2019-12)
      Forecasted changes to climate were used to model variations in the streamflow characteristics of a northern Virginia catchment. Two emission scenarios were applied from international climate projections along with four ...
    • Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings 

      Carter, David R.; Slesak, Robert A.; Harrington, Timothy B.; D'Amato, Anthony W. (2019-12-01)
      Scotch broom (Cytisus scoparius (L.) Link) is an invasive, N-fixing shrub in recently harvested Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) forests in the Pacific Northwest. The ability of Scotch broom ...
    • Test of video with separate caption file 

      Lawrence (2020-02-20)
      This test was created with youtube-dl -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]' --write-auto-sub
    • What's in your repository? 

      McMillan, Gail (Virginia Tech, 2018-02-08)
      Do community-facing resources in the digital repository reflect the work being done at the university? Can examining a microcosm such as the LGBTQ-related materials indicate how successful a university’s digital repository ...
    • Comparison of new composite breeds with the Suffolk breed as terminal sires in an extensive production system: carcass characteristics 

      McKibben, Heather N.; Notter, David R.; Stewart, Whitney C.; Means, Warrie J.; Pierce, Natalie L.; Taylor, J. Bret (2019-12)
    • Managing for the middle: rancher care ethics under uncertainty on Western Great Plains rangelands 

      Wilmer, Halley; Fernandez-Gimenez, Maria E.; Ghajar, Shayan; Taylor, Peter Leigh; Souza, Caridad; Derner, Justin D. (2019-12)
      Ranchers and pastoralists worldwide manage and depend upon resources from rangelands (which support indigenous vegetation with the potential for grazing) across Earth's terrestrial surface. In the Great Plains of North ...
    • Soil Bacterial and Fungal Communities Exhibit Distinct Long-Term Responses to Disturbance in Temperate Forests 

      Osburn, Ernest D.; McBride, Steven G.; Aylward, Frank O.; Badgley, Brian D.; Strahm, Brian D.; Knoepp, Jennifer D.; Barrett, J. E. (2019-12-11)
      In Appalachian ecosystems, forest disturbance has long-term effects on microbially driven biogeochemical processes such as nitrogen (N) cycling. However, little is known regarding long-term responses of forest soil microbial ...
    • Spatial and temporal variation in river corridor exchange across a 5th-order mountain stream network 

      Ward, Adam S.; Wondzell, Steven M.; Schmadel, Noah M.; Herzog, Skuyler; Zarnetske, Jay P.; Baranov, Viktor; Blaen, Phillip J.; Brekenfeld, Nicolai; Chu, Rosalie; Derelle, Romain; Drummond, Jennifer; Fleckenstein, Jan H.; Garayburu-Caruso, Vanessa; Graham, Emily; Hannah, David; Harman, Ciaran J.; Hixson, Jase; Knapp, Julia L. A.; Krause, Stefan; Kurz, Marie J.; Lewandowski, Joerg; Li, Angang; Marti, Eugenia; Miller, Melinda; Milner, Alexander M.; Neil, Kerry; Orsini, Luisa; Packman, Aaron I.; Plont, Stephen; Renteria, Lupita; Roche, Kevin; Royer, Todd; Segura, Catalina; Stegen, James; Toyoda, Jason; Wells, Jacqueline; Wisnoski, Nathan I. (2019-12-20)
      Although most field and modeling studies of river corridor exchange have been conducted at scales ranging from tens to hundreds of meters, results of these studies are used to predict their ecological and hydrological ...
    • Russell the Mussel 

      Conover, Adele; Biggins, Richard; Neves, Richard; Bensusen, Sally; Chorba, Mark (Virginia Polytechnic Institute & State University, 2002)
      “Russell the Mussel” was written for children. It introduces them to the rich variety of aquatic life in streams like Crystal Creek. In this well-illustrated and delightful story Jill learns about the underwater world of ...
    • Essays on Water Quality Management for the Chesapeake Bay Watershed 

      Xu, Yuelu (Virginia Tech, 2020-02-19)
      Water quality management for agricultural production is a complicated and interesting problem. Hydrological and economic factors must be considered when designing strategies to reduce nutrient runoff from agricultural ...
    • Primary/Soft Biometrics: Performance Evaluation and Novel Real-Time Classifiers 

      Alorf, Abdulaziz Abdullah (Virginia Tech, 2020-02-19)
      The relevance of faces in our daily lives is indisputable. We learn to recognize faces as newborns, and faces play a major role in interpersonal communication. The spectrum of computer vision research about face analysis ...
    • Political Economy Of The 2014 Farm Bill 

      Orden, David; Zulauf, Carl (Oxford University Press, 2015-06-11)
      This article assesses the political economy of the 2014 U.S. farm bill, with a focus on the farm support safety net. The farm bill secured substantial bipartisan majorities in a politically contentious Congress. Planned ...
    • The role of vocational education in restructured schools 

      Huffman, N. Thomas (Nelson Thomas); Hoachlander, E. Gareth; Godowsky, Steven H.; Mott, Willie J.; Ingwerson, Donald W.; Hoye, J. D.; Virginia Polytechnic Institute and State University. Video/Broadcast Services; National Center for Research in Vocational Education (U.S.) (Virginia Polytechnic Institute and State University. Video/Broadcast Services, 1992)
      Panelists discuss how students benefit from restructuring when vocational education becomes an integral part of their educational experience
    • Virginia Tech 2010 

      Stith, Randall R.; Cronin, Karen; Hutchens, Jason; Virginia Polytechnic Institute and State University. Visual & Broadcast Communications (Virginia Polytechnic Institute and State University. Visual & Broadcast Communications, 2001)
      Presents a vision of what can happen when Virginia Tech becomes a top-30 research institution
    • Marketing update : hog & pig report, cattle inventory, marketing 

      Kenyon, David E.; Purcell, Wayne D.; Bainbridge, Bruce B.; Virginia Cooperative Extension Service (Virginia Cooperative Extension Service, 1987)
      Discusses reports released by government agencies and their implications on livestock marketing
    • In-woods weighing systems for southern logging 

      Shaffer, Robert M. (Robert Morris); Pearson, Linda; Whiting, Gary; Virginia Cooperative Extension Service; Virginia Polytechnic Institute and State University. School of Forestry and Wildlife Resources (Virginia Cooperative Extension Service, 1989)
      Discussion of weighing systems for the southern logging industry