Reports, Virginia Agricultural Experiment Station
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- A Useful Chart for Teaching the Relation of Soil Reaction to the Availability of Plant Nutrients to CropsPettinger, N. A. (Virginia Agricultural Experiment Station, 1935-03)This publication features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.
- Records and Distribution Problems of Fishes of the North, Middle, and South Forks of the Holston River, VirginiaRoss, Robert D.; Carico, James E. (Virginia Agricultural Experiment Station, 1963-06)Since 1953 a survey has been made of fishes of the North, Middle, and South Forks of Holston River, Tennessee River system, Virginia. This paper gives records of fishes obtained, notes on drainage history, and distribution problems of Holston River fishes.
- The costs of marketing slaughter cattle by computerized and conventional auction systemsChieruzzi, Alice M., 1956-; Buccola, Steven T. (Virginia Agricultural Experiment Station, 1981)
- Meat and seafood demand patterns : a comparison of the S1- branch demand system and the constant elasticity of demand systemCapps, Oral; Havlicek, Joseph (Virginia Agricultural Experiment Station, 1981)
- Analysis of aggregate fish and shellfish expenditureCapps, Oral (Virginia Agricultural Experiment Station, 1982)
- Computer simulation of hourly dry-bulb temperaturesKline, D. Earl; Reid, John F.; Woeste, Frank E. (Virginia Agricultural Experiment Station, 1982)A computer model of hourly dry-bulb temperatures was developed for Blacksburg, Virgi nia, from a 9-year sample of hourly dry-bulb temperature data. The periodic variations over the course of a year were estimated by least-square approximation. A first order Markov chain model was used to simulate the stochastic nature of temperature. These two models were combined to simulate years of hourly dry-bulb temperatures.
- Insects and insecticide use on flue-cured tobacco in Virginia during 1979Semtner, Paul J. (Virginia Agricultural Experiment Station, 1982-05)
- Milk movement and plant location for minimizing milk marketing costs in the SoutheastMcDowell, F. Howard; Conner, Maynard C. (Virginia Agricultural Experiment Station, 1982-08)Various institutional and economic forces influence the current organizational structure of the dairy industry. Among the institutional forces are various state marketing regulations and commissions, the United States Department of Agriculture with its marketing and pricing policies and agencies, the Federal Trade Commission, and the United States Department of Justice. The economic forces seem to be embodied in new technologies associated with processing and transportation...
- Hemorrhagic enteritis of turkeys, marble spleen disease of pheasants, avian adenovirus group II, splenomegaly of chickens : a bibliographyDomermuth, Charles H.; Rittenhouse, Judith G. (Virginia Agricultural Experiment Station, 1982-10)
- Production, consumption and storage of Virginia corn and soybeansKenyon, David E.; Mundy, Karen P. (Karen Planson), 1943- (Virginia Agricultural Experiment Station, 1983)
- The mycoplasmas. Volume 5, 1978-1982 : a bibliography and indexDomermuth, Charles H.; Rittenhouse, Judith G. (Virginia Agricultural Experiment Station, 1983)This bibliography lists the titles of most of the research literature which deal primarily with the mycoplasmas and were published in late 1978, 1979, 1980, 1981 and early 1982. The references included in this volume have come to the authors ' attention in their original published form , or as referred to in Chemical Abstraets, Index Medicus, Biological Abstracts, Veterinary Bulletin, Index Veterinarius, and/ or Dissertation Abstracts. References whenever possible have been indexed both by species and by subject matter . A prepublication copy of a recent manuscript by E. A. Freundt was consulted to insure completeness of new species listings...
- Sediment detachment and transport functions to simulate soil loss from reclaimed mine soilsWolfe, Mary Leigh; Shanholtz, Vernon O.; Rice, Loren L.; Ross, Burton Blake (Virginia Agricultural Experiment Station, 1983)The Finite Element Storm Hydrograph Model ( FESHM), a distributed parameter model developed in the Department of Agricultural Engineering at Virginia Polytechnic Institute and State University, was modified to predict sediment yield from surface-mined areas. Separate functions were included to define interrill detachment, rill detachment, and transport capacity of overland flow. Data from rainfall simulator studies, which were conducted at two surface mine sites in southern West Virginia, were used for field verification of the model. A comparison of simulated and recorded hydrographs showed good agreement. The model, however, consistently overpredicted sediment yield. Two factors, aggregate stability and armoring, were shown to contribute to the biased predictions.
- Structural development and evaluation of a modular houseHurst, Homer T. (Virginia Agricultural Experiment Station, 1983)
- An investigation of soils within the Tatum and Elioak mapping units in the Virginia PiedmontWilson, M. A.; Zelazny, Lucian W.; Baker, James C. (Virginia Agricultural Experiment Station, 1983-03)
- Engineering properties of selected soils in the Virginia PiedmontParker, Jack C.; Amos, Dan F.; Baker, James C. (Virginia Agricultural Experiment Station, 1983-10)The Piedmont Province i Virginia, running in a north-south direction, is approximately 50 miles wide along the Maryland border I ard broadens to the south until it encompasses approximately 150 miles along the North Carolina border. It cor prises at least one-third of the land area of the stat , with approximately 60% occupied by woodland and 40% by agriculture, primarily beef or dairy enterprises. Located in the Piedmont j:e the cities of Leesburg, Fairfax, Manassas, Warrenton, Culpeper, Charlottesville, Lynchburg , Bedford, Farmville, Martinsville, Danville and South Boston. I an McHargue, in his book Design With Nature, studied the Potomac River watershed and concluded that "the Piedmont is primaril suitable for urbanization with attendant agriculture and undifferentiated recreation" (McHargue 1969). Because of the development potential of the Piedmont and the intense pressures for future urbanization west of Washington, D.C., in the counties of Fairfax, Prince William and Loudoun; around Richmond in the counties of Hanover, Hen ico, Goochland, Powhatan, Amelia and Chesterfield; an in Albemarle, Amherst, Bedford, Campbell, Franklin, Henry and Pittsylvania counties, the need to intensively study the most widely distributed and potentially important Piedmont soils became apparent....
- Supplemental data for soil survey report of Greensville County, VirginiaEdmonds, William J.; Sabo, P. B.; Peacock, C. D. (Virginia Agricultural Experiment Station, 1984)A soil survey of Greensville County was completed in 1984 by the Agronomy Department of Virginia Polytechnic Institute and State University, Research Division, in Cooperation with the Soil Conservation Service of the United States Department of Agriculture, the J. R. Horsley Soil and Water Conservation District, and the Greensville County Board of Supervisors. This survey was made to determine the kinds of soils within Greensville County and how they can be used to their fullest potential. Soil scientists observed the steepness, length, and shape of slopes; the size of streams and general pattern of drainage; the kinds of native plants or crops; and the kinds of rocks. They dug many pits to describe and sample soil profiles. A profile is the sequence of natural layers, or horizons, in a soil. It extends from the land surface down into the parent material, i.e. weathered rock or unconsolidated sediments which have been changed little by plant roots. Soil maps are produced when soil scientists draw boundaries, on aerial photographs, of the kinds of soils observed in the survey area. These photographs show trees, buildings, fields, roads, and other natural and cultural features that were used to locate these soil boundaries. Mapping units are collections of delineations identified by a single symbol on soil maps. Most mapping units represent natural soil bodies composed of one kind of soil or of soils with similar properties and responses to use and management. Other mapping units are made up of two or more kinds of soils. Since the Soil Survey of Greensville County, Virginia, does not include the actual laboratory data used to characterize, classify and interpret the soils within the mapping units, this supplemental report presents these data.
- An evaluation of no-tillage culture for burley tobaccoLink, Leo A. (Virginia Agricultural Experiment Station, 1984)
- An analysis of the pork industry in Maryland, North Carolina, Pennsylvania, and VirginiaMundy, Karen; Kenyon, David E.; Crowgey, John (Virginia Agricultural Experiment Station, 1984)
- The finite element storm hydrograph model user's guideSmolen, M. D.; Ross, Burton Blake; Younos, Tamim M.; Sydor, W. J. (Virginia Agricultural Experiment Station, 1984)
- Determining transport parameters from laboratory and field tracer experimentsParker, Jack C.; Van Genuchten, Martinus Th. (Virginia Agricultural Experiment Station, 1984)This bulletin describes a nonlinear least-squares inversion method that can be used to identify several parameters in a number of theoretical one-dimensional solute transport models. One of the models discussed is the usual convection-dispersion transport equation that includes terms accounting for linear equilibrium adsorption, zero-order production and/or first-order decay. In addition, a two-site/two-region model is described that can be applied to various non-equilibrium transport problems. Also included is a stochastic model that considers the effects of areal variations in hydraulic fluxes on field-scale solute transport. This last model also has provisions for zero- or first-order production and/or decay. The least-squares inversion method can be used to analyze both spatial and temporal distributions of flux or resident concentrations. A detailed description of the computer program, called CXTFIT, is given in one of the appendices of this bulletin. Several example problems illustrating practical applications of the program are discussed in detail.