Recent Submissions

  • Economics of greenhouse heating with a mine air-assisted heat pump 

    Marsh, L. S.; Singh, S. (American Society of Agricultural and Biological Engineers, 1994)
    An analysis of the economics of greenhouse heating with a heat pump coupled with an inactive deep mine is presented. Several heat pump and conventional gas-fired heater combinations (hybrid systems) were evaluated using a ...
  • Statistical distribution functions for bone strength of leghorn layers 

    Wilson, J. H. (American Society of Agricultural and Biological Engineers, 1992)
    Shear strength tests were conducted on tibia, humerus, and radius bones from white leghorn layers to establish the type of statistical distribution function that best fits poultry bone strength data. The results indicated ...
  • Manure and wastewater management systems for open lot dairy operations 

    Sweeten, J. M.; Wolfe, M. L. (American Society of Agricultural and Biological Engineers, 1994)
    Dairy industry expansion using open lot designs has impacted water quality and groundwater usage in parts of Central Texas. Field research was conducted at commercial dairy farms in Erath County, Texas, to develop improved ...
  • MIXFIT: A microcomputer-based routine for fitting heterogeneous probability distribution functions to data 

    Cooke, R. A.; Mostaghimi, Saied (American Society of Agricultural and Biological Engineers, 1994)
    Some engineering data represent a mixture of data from two distinct populations or result from two or more concomitant phenomena. Homogeneous probability density functions are not always suitable for representing such data. ...
  • Relationships between drainage area, slope length, and slope gradient for riparian slopes in Virginia 

    Inamdar, S. P.; Dillaha, Theo A. (American Society of Agricultural and Biological Engineers, 2000)
    Surface runoff and interflow generated on riparian hillslopes concentrate along rills or topographic depressions as they move downslope. This runoff concentration is an important factor that determines the effectiveness ...
  • Effects of forest harvesting best management practices on surface water quality in the Virginia coastal plain 

    Wynn, T. M.; Mostaghimi, Saied; Frazee, J. W.; McClellan, P. W.; Shaffer, R. M.; Aust, W. M. (American Society of Agricultural and Biological Engineers, 2000)
    Three small watersheds located in Westmoreland County, Virginia, were monitored to evaluate the impact of forest clearcutting on surface water quality and to evaluate the effectiveness of forestry best management practices ...
  • Impact of agrichemical facility best management practices on runoff water quality 

    Shukla, S.; Mostaghimi, Saied; Lovern, S. B.; McClellan, P. W. (American Society of Agricultural and Biological Engineers, 2001)
    Water quality effects of structural and managerial BMPs implemented at an agrichemical mixing and handling facility, located in an agricultural watershed in Virginia, were investigated in this study. The measured water ...
  • BMP impacts on sediment and nutrient yields from an agricultural watershed in the coastal plain region 

    Inamdar, S. P.; Mostaghimi, Saied; McClellan, P. W.; Brannan, Kevin M. (American Society of Agricultural and Biological Engineers, 2001)
    The goal of the Nomini Creek watershed monitoring study was to quantify the effectiveness of BMPs at the watershed scale and to determine if the improvements in water quality could be sustained over a long-term period. ...
  • Reliability of odor offensiveness quantification using the refined cloth swatch olfactometric technique 

    Gay, S. W.; Wheeler, E. F.; Kephart, K. B. (American Society of Agricultural and Biological Engineers, 2001)
    The cloth swatch olfactometric technique uses flannel swatches to absorb odors for presentation to a trained human sensory panel. This study examined the reliability of the refined cloth swatch technique used to facilitate ...
  • Laboratory measurements and modeling N mineralization potential in Virginia Coastal Plain agricultural, fallow, and forest soils 

    Shukla, S.; Mostaghimi, Saied; Burger, J. A. (American Society of Agricultural and Biological Engineers, 2000)
    A long-term aerobic incubation and leaching technique was used to measure N mineralization of surface and subsurface soils (sandy loam) from agricultural,forest, and fallow sites in a Virginia Coastal Plain watershed. N ...
  • 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 ...
  • Cover crop/dairy manure management systems: Water quality and soil system impacts 

    Kern, J. D.; Wolfe, M. L. (American Society of Agricultural and Biological Engineers, 2005)
    A field study was conducted to determine impacts of corn silage production systems that included a rye cover crop and application of liquid dairy manure in the spring and fall on water quality and soil characteristics. ...
  • Cost-effective BMP placement: Optimization versus targeting 

    Veith, T. L.; Wolfe, M. L.; Heatwole, C. D. (American Society of Agricultural and Biological Engineers, 2004)
    Cost-effectiveness of nonpoint-source pollution reduction programs in an agricultural watershed depends on the selection and placement of control measures within the watershed. Locations for best management practices (BMPs) ...
  • Sensitivity analysis of the Virginia phosphorus index management tool 

    Jesiek, J. B.; Wolfe, M. L. (American Society of Agricultural and Biological Engineers, 2005)
    The phosphorus index (P-Index) is a risk assessment and management tool to aid in reducing the risk to water quality due to movement of excess phosphorus (P) from fields. An allowable P application rate is specified based ...
  • Sediment and nutrient modeling for TMDL development and implementation 

    Borah, D. K.; Yagow, G.; Saleh, A.; Barnes, P. L.; Rosenthal, W.; Krug, E. C.; Hauck, L. M. (American Society of Agricultural and Biological Engineers, 2006)
    At present, there are over 34,000 impaired waters and over 58,000 associated impairments officially listed in the U.S. Nutrients and sediment are two of the most common pollutants included in the list. States are required ...
  • Stream discharge measurement using a large-scale particle image velocimetry (LSPIV) prototype 

    Harpold, A. A.; Mostaghimi, Saied; Vlachos, Pavlos P.; Brannan, Kevin M.; Dillaha, Theo A. (American Society of Agricultural and Biological Engineers, 2006)
    New technologies have been developed for open-channel discharge measurement due to concerns about costs, accuracy, and safety of traditional methods. One emerging technology is large-scale particle image velocimetry (LSPIV). ...
  • Modeling bacteria fate and transport in watersheds to support TMDLs 

    Benham, B. L.; Baffaut, C.; Zeckoski, R. W.; Mankin, K. R.; Pachepsky, Y. A.; Sadeghi, A. A.; Brannan, Kevin M.; Soupir, M. L.; Habersack, M. J. (American Society of Agricultural and Biological Engineers, 2006)
    Fecal contamination of surface waters is a critical water-quality issue, leading to human illnesses and deaths. Total Maximum Daily Loads (TMDLs), which set pollutant limits, are being developed to address fecal bacteria ...
  • 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 ...
  • 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 ...
  • Methods for determining streambank critical shear stress and soil erodibility: Implications for erosion rate predictions 

    Clark, L. A.; Wynn, T. M. (American Society of Agricultural and Biological Engineers, 2007)
    According to the U.S. EPA, excess sediment is a significant cause of water quality impairment for rivers. The goal of this study was to compare different methods of determining two parameters used to estimate streambank ...

View more