Now showing items 245-260 of 260

  • Ultrasonic water measurement in irrigation pipelines with disturbed flow 

    Johnson, A. L.; Benham, B. L.; Eisenhauer, D. E.; Hotchkiss, R. H. (American Society of Agricultural and Biological Engineers, 2001)
    Ultrasonicflow meter accuracy was investigated over a range of flow conditions (3 pipe materials, 2 pipe sizes, 4 Reynolds numbers, 7 flow-disturbing devices) commonly found in irrigation systems. Flow rate measurements ...
  • Uncertainty in TMDL models 

    Shirmohammadi, A.; Chaubey, I.; Harmel, R. D.; Bosch, D. D.; Munoz-Carpena, R.; Dharmasri, C.; Sexton, A.; Arabi, M.; Wolfe, M. L.; Frankenberger, J.; Graff, C.; Sohrabi, T. M. (American Society of Agricultural and Biological Engineers, 2006)
    Although the U.S. Congress established the Total Maximum Daily Load (TMDL) program in the original Clean Water Act of 1972, Section 303(d), it did not receive attention until the 1990s. Currently, two methods are available ...
  • Urban Agricultural Event 

    Camm, Kevin (Virginia Tech, 2012-12)
    Many authors and researchers agree that our youth will benefit from learning about agriculture. “Agricultural literacy is an essential factor for continuing success of the nation. It is important to reach the population ...
  • Use of biological indicators in TMDL assessment and implementation 

    Yagow, G.; Wilson, B.; Srivastava, P.; Obropta, C. C. (American Society of Agricultural and Biological Engineers, 2006)
    Most states in the U.S. have a general water quality standard intended to protect water from all potential pollutants not specifically named or identified in other standards. Biological indicators are used, in part, to ...
  • Using a bundled amenity model to estimate the value of cropland open space and determine an optimal buffer zone 

    Kuminoff, N. V. (Western Agricultural Economics Association, 2009-04)
    This study investigates how proximity to cropland influences residential property values and considers the public policy implications. The hedonic model generalizes previous studies by recognizing that the bundle of ...
  • Using Microscopy to Assess Chorion Structural Integrity and Parasitoid Oviposition Sites on Stink Bug (Hemiptera: Pentatomidae) Eggs 

    Koppel, A. L.; Herbert, D. A.; Westbrook, E. W. (Cambridge University Press, 2011-02)
    Previous efficacy studies found that many insecticides used by growers could be having an adverse effect on egg parasitoids (Telenomus podisi) developing in the eggs of the brown stink bug (Euschistus servus), while unhatched ...
  • Using photointerpretation and publicly available software to assess revegetation ground cover on a shaded hillside 

    Crawley, Allen Thomas (Virginia Tech, 2011-04-19)
    This project examined the potential of three plant species, Heuchera micrantha, Polystichum acrostichoides and Pachysandra procumbens individually and in various combinations as potential ground cover for a heavily shaded ...
  • VA-C 92R : a new high-yielding peanut variety 

    Mozingo, R. W. (Roy Walton), 1940-; Wynne, J. C. (Johnny Calvin), 1943-; Porter, D. Morris; Coffelt, T. A.; Isleib, Thomas G., 1954- (Virginia Agricultural Experiment Station, 1993-01)
  • Variation in Eimeria oocyst count and species composition in weanling beef heifers 

    Lucas, A. S.; Swecker, W. S.; Scaglia, G.; Lindsay, D. S.; Zajac, A. M. (American Society of Parasitology, 2006-10)
    Rectal fecal samples were collected daily on 10 consecutive days in November 2004 from I I weaned beef heifers to assess daily variation in fecal oocyst count and species composition. Subsequent samples were collected from ...
  • Vegetable Fermentation 

    Eifert, Joell (Virginia Tech, 2014-07)
    People have been fermenting vegetables for centuries to increase the stability of fresh foods, to make the foods safer to eat in the absence of refrigeration and to enhance their flavor. Today, vegetable fermentation is ...
  • The Virginia 81 bunch peanut (VA 81B) 

    Coffelt, T. A.; Mozingo, R. W. (Roy Walton), 1940-; Porter, D. Morris; Allison, Allen Hickman, 1926- (Virginia Agricultural Experiment Station, 1984)
  • Virginia simulated hog returns, 1977-1988 : growing versus buying corn 

    Thornsbury, Suzanne D.; Kenyon, David E. (Virginia Agricultural Experiment Station, 1990-04)
  • Virginia’s Community Canneries 

    Meade, Donna (Virginia Tech, 2012-05)
    The Commonwealth of Virginia currently has eleven remaining seasonally operating community canneries located in nine counties, most of which are located in the rural central and southwest portion of the state. Ten of those ...
  • Water Quality Assessment of the Lewis Ginter Botanical Garden Irrigation Pond 

    Stretchko, Karin (Virginia Tech, 2012-12)
    Stormwater reuse for irrigation purposes on public and private land is a way to overcome the increasing pressure on finite water resources. Unfortunately, stormwater runoff can contain common pollutants such as nutrients, ...
  • What is the "real" impact of invasive plant species? 

    J. N. Barney; D. R. Tekiela; E. S. J. Dollete; B. J. Tomasek (Ecological Society of America, 2013-08)
    Invasive plant species should be evaluated and prioritized for management according to their impacts, which include reduction in native diversity, changes to nutrient pools, and alteration of fire regimes. However, the ...
  • When flexible forms are asked to flex too much 

    Driscoll, P. J. (Western Agricultural Economics Association, 1994-07)
    Taylor series-based flexible forms cannot be interpreted as Taylor series approximations unless all data used in estimation lie in a region of convergence. When flexible forms lose their Taylor series interpretation, ...