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Browsing Scholarly Works, Department of Biological Systems Engineering by Issue Date
Now showing items 1-20 of 269
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Statistical distribution functions for bone strength of leghorn layers
(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 ... -
Economics of greenhouse heating with a mine air-assisted heat pump
(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 ... -
Manure and wastewater management systems for open lot dairy operations
(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
(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
(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 ... -
Laboratory measurements and modeling N mineralization potential in Virginia Coastal Plain agricultural, fallow, and forest soils
(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 ... -
Effects of forest harvesting best management practices on surface water quality in the Virginia coastal plain
(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 ... -
Reliability of odor offensiveness quantification using the refined cloth swatch olfactometric technique
(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 ... -
Impact of agrichemical facility best management practices on runoff water quality
(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
(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. ... -
Ultrasonic water measurement in irrigation pipelines with disturbed flow
(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 ... -
Plumbing systems of agricultural sprayers
(Virginia Cooperative Extension, 2001)The plumbing systems of agricultural sprayers are usually considered foolproof. Sprayer problems may occur if plumbing and/or modifications are improperly done or maintenance is ignored. Retrofitting, addition of electrical ... -
Fine tuning a sprayer with ounce calibration method
(Virginia Cooperative Extension, 2001)This extension publication discusses guidelines to quickly evaluate the performance of a sprayer. Sprayer calibration, nozzle discharge, spray pattern uniformity, speed checks, pump performance and plumbing arrangements ... -
The influence of lactose hydrolysis on the strength and sensory characteristics of vanilla ice cream
(American Society of Agricultural and Biological Engineers, 2003)Lactose hydrolysis was investigated as a method of producing a more extrudable ice cream product. Ice cream mixes were treated with lactase from the microbial sources Kluyveromyces lactis and Aspergillus oryzae to produce ... -
Cost-effective BMP placement: Optimization versus targeting
(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) ... -
Cover crop/dairy manure management systems: Water quality and soil system impacts
(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. ... -
Sensitivity analysis of the Virginia phosphorus index management tool
(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 ... -
Precision Farming Tools. Global Positioning System (GPS)
(Virginia Cooperative Extension, 2005-09-01)By knowing location, farmers can look at the field as a group of small zones and determine if the field is uniform or not. Computers and geographical information systems (GIS) enable producers to record location and other ...
