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Articles 1 - 14 of 14
Full-Text Articles in Engineering
Estimating The Payback For An Electrical Vfd (Variable Frequency Drive) Application In A Pumping Plant Which Presently Spills Excess Pumpage, Charles M. Burt
Estimating The Payback For An Electrical Vfd (Variable Frequency Drive) Application In A Pumping Plant Which Presently Spills Excess Pumpage, Charles M. Burt
BioResource and Agricultural Engineering
This report includes equations and tips for pump selection criteria and estimating the annual KW-hr savings for a VFD installation, including the maximum potential savings and the approximate amount of KW-hr that would have been consumed if one pump had been converted to VFD.
Monolithic Concrete Irrigation Pipe, Charles M. Burt, John M. Wegener
Monolithic Concrete Irrigation Pipe, Charles M. Burt, John M. Wegener
BioResource and Agricultural Engineering
Monolithic concrete pipe (also known as "Cast-in-Place Concrete Pipe" (CIPCP) or Cast-In-Place Pipe (CIPP)) is widely used in some regions for purposes such as storm, sewer, or irrigation pipelines. The earliest use of CIPCP was in 1922 in the Turlock Irrigation District of California. It is reported by The Sierra Group (Sierra, 1991) that there are over 15 million linear feet (4.6 million linear meters) of CIPCP under various applications. Nevertheless, many irrigation engineers, especially outside the U.S., are unaware of CIPCP. Monolithic concrete irrigation pipe is seldom mentioned in irrigation design literature. This paper has been written to familiarize …
Grassland Basin Irrigation And Drainage Study, Stuart W. Styles, Dennis Westcot, Dr. Charles M. Burt, Ross Steensen
Grassland Basin Irrigation And Drainage Study, Stuart W. Styles, Dennis Westcot, Dr. Charles M. Burt, Ross Steensen
BioResource and Agricultural Engineering
This paper summarizes a project that analyzed the district irrigation efficiency for six subareas of the Grassland Basin roughly representing 80,000 acres on the west side of the San Joaquin Valley near Firebaugh, California. The objectives of this project were to: • Determine the district irrigation efficiency for the six subareas. • Update district drainage policies and water reuse. • Update the geographical information system (GIS). • Perform a pre-plant irrigation efficiency analysis. • Establish a relationship between the drainage volumes and the district irrigation efficiency. • Determine the maximum district irrigation efficiency attainable. • Determine the impact of optimizing …
Evaluating Strength & Energy Requirements For Workers Picking Vegetables, R. A. Cavaletto, J. Miles, J. Meyers, J. Mehlschau
Evaluating Strength & Energy Requirements For Workers Picking Vegetables, R. A. Cavaletto, J. Miles, J. Meyers, J. Mehlschau
BioResource and Agricultural Engineering
The paper discusses the need to obtain field data to evaluate the strength and energy requirements for workers picking a variety of vegetables. This information is central to the evaluation of hazards related to repetitive motion, excessive stress, and fatigue. Results can be used to select activities which should be targeted for future engineering design projects. Preliminary data from a commercial broccoli harvesting operation is included.
Method And Apparatus For Objective Evaluation Of Patent Ambulation, Balance And Weight Bearng Status, Eric B. Lancaster, Michael F. Kocher
Method And Apparatus For Objective Evaluation Of Patent Ambulation, Balance And Weight Bearng Status, Eric B. Lancaster, Michael F. Kocher
Department of Biological Systems Engineering: Papers and Publications
A walker is provided which is equipped with detectors for measuring various loads and torques placed thereon by a user including right side and left side loads as well as torque loads on the handles of the walker and having time and distance detectors to allow the ambulation status of a user to be progressively monitored by medical personnel.
Industrial Uses Of Soyoil: A Market Analysis, Janice L. Callum
Industrial Uses Of Soyoil: A Market Analysis, Janice L. Callum
Industrial Agricultural Products Center: Publications and Information
Industry Structure
Lubricants' base oil production is virtually controlled by five, vertically integrated, multi-national companies. Their market shares are large enough to permit strong influence over the entire industry and to render competition ineffective. It will be difficult for new firms to enter the lubricant's industry and compete successfully with these entrenched firms. The lubricants market is large. The market is dominated by petroleum based, mineral oil products. Projected market growth is minimal, and worldwide supply is ample. Growing environmental awareness and the prospect of stringent regulations regarding petroleum products use have spurred renewed interest in the manufacture of vegetable …
Pesticide Application And Handling Technology: Proper Disposal Of Empty Pesticide Containers, G. A. Watkins, Samuel G. Mcneill, S. A. Shearer
Pesticide Application And Handling Technology: Proper Disposal Of Empty Pesticide Containers, G. A. Watkins, Samuel G. Mcneill, S. A. Shearer
Agricultural Engineering Extension Updates
Recycling has become more and more popular as our awareness of environmental concerns grow. These environmental concerns have led to increased participation in recycling efforts among today's farmers. Many farmers throughout Kentucky are now able to recycle their empty plastic pesticide containers (Five gallon or less) due to a statewide Rinse and Return program. Recycling of empty containers provides a safe means of disposal for applicators, reduces landfill space, and protects our valuable water resources.
Pesticide Application And Handling Technology: Installing A Sprayer Tank Rinse Circuit, G. A. Watkins, Samuel G. Mcneill, S. A. Shearer
Pesticide Application And Handling Technology: Installing A Sprayer Tank Rinse Circuit, G. A. Watkins, Samuel G. Mcneill, S. A. Shearer
Agricultural Engineering Extension Updates
Proper tank rinsing techniques for agricultural sprayers are very important in order to protect against cross-contamination in subsequent loads and to ensure safe disposal of any excess chemicals and rinsate (rinse water). Spray tanks and other sprayer components should be cleaned after each use. In most situations, sprayer rinsate will have to be sprayed out in the field - either onto a reserved strip, or by over-spraying in the treated area (subject to the terms of the product label).
Notes On Wiring Greenhouses For Tobacco Float Plants, Doug Overhults
Notes On Wiring Greenhouses For Tobacco Float Plants, Doug Overhults
Agricultural Engineering Extension Updates
Following are some guidelines for electrical wiring in greenhouses that are being constructed to grow tobacco transplants. A greenhouse is distinctly different from a residence; different wiring practices should be used. This material closely follows the National Electrical Code (NEC) but is not intended to be a complete installation guide. The purpose is to provide some basic suggestions for planning a safe electrical system. Additional details can be found in the "Farm Buildings Wiring Handbook" (MWPS-28) available from the UK Ag. Engineering Plan Service.
Hycrest Crested Wheatgrass Accelerates The Degradation Of Pentachlorophenol In Soil, A. Ferro, Ronald C. Sims, B. Bugbee
Hycrest Crested Wheatgrass Accelerates The Degradation Of Pentachlorophenol In Soil, A. Ferro, Ronald C. Sims, B. Bugbee
Biological Engineering Faculty Publications
We investigated the effects of vegetation on the fate of pentachlorophenol (PCP) in soil using a novel high-flow sealed test system. Pentachlorophenol has been widely used as a wood preservative, and this highly toxic biocide contaminates soil and ground water at many sites. Although plants are known to accelerate the rates of degradation of certain soil contaminants, this approach has not been thoroughly investigated for PCP. The fate of [14C]PCP, added to soil at a concentration of 100 mg/kg, was compared in three unplanted and three planted systems. The plant used was Hycrest, a perennial, drought-tolerant cultivar of crested wheatgrass …
Adsorption-Dissolution Reactions Affecting The Distribution And Stability Of Coii Edta In Iron Oxide-Coated Sand, James E. Szecsody, John M. Zachara, Patrick Bruckhart
Adsorption-Dissolution Reactions Affecting The Distribution And Stability Of Coii Edta In Iron Oxide-Coated Sand, James E. Szecsody, John M. Zachara, Patrick Bruckhart
US Department of Energy Publications
The time-variant chemical behavior of CoIIEDTA (and other metal-EDTA complexes) was investigated in suspensions of iron oxide-coated sand to identify equilibrium and kinetic reactions that control the mobility of MeIIEDTA complexes in subsurface environments. Batch experiments were conducted to evaluate the adsorption as a function of pH, concentration, and time and to quantify the rate-controlling step(s) of dissolution of the iron oxide by EDTA complexes. Ionic Co2+ exhibited typical cation-like adsorption, whereas MeIIEDTA adsorption was ligand-like, increasing with decreasing pH. Adsorption isotherms for all reactive species exhibited Langmuir behavior, with site saturation occurring …
Interaction Of Hydrophobic Organic Compounds With Mineral-Bound Humic Substances, Ellyn M. Murphy, John M. Zachara, Steven Smith, Jerry Phillips, Thomas Wletsma
Interaction Of Hydrophobic Organic Compounds With Mineral-Bound Humic Substances, Ellyn M. Murphy, John M. Zachara, Steven Smith, Jerry Phillips, Thomas Wletsma
US Department of Energy Publications
The sorption of hydrophobic organic compounds (HOC) on mineral-associated peat humic acid (PHA) was evaluated under different pH and electrolyte regimes. Relative size distribution measurements indicated that PHA was “coiled” in solution at high ionic strength (I) and elongated at low I. The sorption of PHA to hematite and kaolinite varied with I and electrolyte cation, suggesting that the configuration of the humic acid in solution influenced its structure on the mineral surface. The sorption maxima for PHA on kaolinite indicated that PHA occupies twice the mineral surface area at low I (0.005) as that observed at …
Light, Chlorophyll, Carboxylase Activity And Co2 Fixation At Various Depths In The Chlorenchyma Of Opuntia Ficus-Indica (L.) Miller Under Current And Elevated Co2, Park S. Nobel, Muyi Cui, Alvaro A. Israel
Light, Chlorophyll, Carboxylase Activity And Co2 Fixation At Various Depths In The Chlorenchyma Of Opuntia Ficus-Indica (L.) Miller Under Current And Elevated Co2, Park S. Nobel, Muyi Cui, Alvaro A. Israel
US Department of Energy Publications
Mature cladodes of Opuntia ficus-indica (L.) Miller have a thick chlorenchyma (about 4 mm) with a relatively high chlorophyll content (0-65 g m-2), suggesting that light may be greatly attenuated and hence CO2 fixation negligible in the inner part of this tissue. Indeed, blue light (400-470 nm) and red light (670-685 nm) were 99% attenuated in the outer 2 mm of the chlorenchyma when the cladodes developed under both current and elevated CO2 concentrations. Nevertheless, the nocturnal acidity increase and 14C accumulation following a brief exposure to 14CO2 at night decreased only 22 …
Monte Carlo Calculation Of Effective Diffusivities In Two- And Three-Dimensional Heterogeneous Materials Of Variable Structure, Mark R. Riley, Fernando J. Muzzio, Helen M. Buettner, Sebastian C. Reyes
Monte Carlo Calculation Of Effective Diffusivities In Two- And Three-Dimensional Heterogeneous Materials Of Variable Structure, Mark R. Riley, Fernando J. Muzzio, Helen M. Buettner, Sebastian C. Reyes
Department of Biological Systems Engineering: Papers and Publications
A Monte Carlo technique that simulates tracer diffusion in multiphase materials of arbitrary complexity has been developed. Effective diffusivities are calculated for structures consisting of either overlapping or nonoverlapping inclusions with diffusivity Dc, distributed in a continuous phase with diffusivity D0>Dc. Two-dimensional simulations for various values of D0/Dc generate normalized diffusivities that correspond closely to their three-dimensional counterparts; they nearly collapse to a common curve when a simple scaling relation is applied.