Engineering Commons^™

Post-Effect Of Ammonia On Energetics Of Laying Hens At High Temperatures, Hongwei Xin, James A. Deshazer, M. M. Beck

Hongwei Xin

Leghorn layers were monitored for heat loss, feed intake, egg production and respiratory rate at various environmental temperatures (TJ after first being exposed to aerial ammonia (NH3). The initial exposure was to 10 or 60 ppm NH3 at a T, of 25 °C for 30 days to simulate a winter environmental condition in a poultry facility. Hens were then allowed to recover in an environment of 5 ppm of NH3 at a T^ of 22 °C for seven days to simulate a spring environmental condition. Birds were then placed individually in a partitional calorimeter free of NH3 at 25, 29, …

Electric Fencing In The West Kimberley Environment, West Kimberley Soil Conservation District Advisory Committee, Western Australian Department Of Agriculture

All other publications

The material and erection cost of a well designed electric fence for cattle control is only 40% that of a traditional barbed fence. However to become acceptable low cost alternative to the "Kimberley Cattle Fence" an electric fence must demonstrate a comparable degree of stock control along with acceptable maintenance inputs. Electric fence evaluation by both pastoral industry and W.A.D.A. has highlighted some of the practical do's and don'ts of this technology. A summary of these practicalities is complied here as a guide to those considering electric fencing in the Kimberley environment.

Highway Drain Depth And Soil Stability, Mizher Al-Himdani

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The presence of moisture in the soil reduces its shear strength. After the rain or snowmelt, the high percentage of moisture in the subgrade of highway, causes the instability resulting into failure of the highway due to high water table. Therefore, it is essential to install a drainage system to remove the excess moisture from the subgrade of highways to avoid its failure.

In the present study, six different soil samples have been studied to observe its failure by triaxial shear strength and corresponding moisture content was noted. The tension applied to remove moisture was converted to equivalent drain depth. …

Earth-Coupled Heat Pump Systems--Selection, Design & Performance, Larry W. Turner, Donald G. Colliver, W. E. Murphy

Agricultural Engineering Energy Series

Rising energy costs have caused many people to look for more efficient ways to heat and cool their homes. One of the most energy-efficient systems to come along in recent years is the earth-coupled heat pump. Pioneered at the University of Kentucky in the 1950s, the earth-coupled system relies on the thermal capacity of water to transfer heat, whereas conventional heat pump relies on outside air. ln an earth-coupled system, water source heat pump is connected (or "coupled") to pipes in the ground or in wells for the source of heat in winter and cool air in the summer. In …

Sorption Of Binary Mixtures Of Aromatic Nitrogen Heterocyclic Compounds On Subsurface Materials, John M. Zachara, Calvin C. Ainsworth, Christina E. Cowan, Berta L. Thomas

US Department of Energy Publications

Single and binary solute sorption of pyridine, quinoline, and acridine has been investigated on two low organic carbon subsurface materials with similar properties but different equilibrium pH when saturated with water. Single solute sorption for all compounds is higher in the acidic soil as compared to the basic soil, reflecting stronger sorption of the protonated organic cations. The protonated species exhibit high selectivity for the exchange complex at low aqueous concentration with selectivity increasing with ring number. Binary sorption experiments with quinoline/pyridine and quinoline/acridine demonstrate that competitive sorption occurs between compounds in the acidic subsoil where the protonated compound species …

Instructions To Connect An Agtext Telecaption Ii Decoder To Your Tv In Rural Areas, Tom Priddy

Agricultural Engineering Extension Updates

• Follow all safety instructions as provided in your Telecaption II Decoder manual.
• Plug your Telecaption II Decoder into regular 110-115V house current outlet.
• Plug your TV power cord into the rear of your Telecaption II Decoder.
• Turn your TV on (from this point your Telecaption II Decoder turns your TV off/on). Now press the Decoder ''power on'' button.
• Look at the rear panel of your Telecaptlon II Decoder. Connect your outside antenna (or cable coaxial if you're on cable TV) to the rear of your Telecaption II Decoder connection labeled "from ant or cable''. If you are using TV ribbon, …

Trickle Irrigation Installation For Horticulture Crops, Richard C. Warner, Jim Baier

Agricultural Engineering Extension Updates

Course Outline

1. Trickle Irrigation Overview
2. Design Planning
3. Water Supply
4. Basic Trickle Irrigation System
5. Design Drawing
6. Installation
7. Emitter Clogging Problems
8. Irrigation Scheduling

Grain Drying & Storage - Quick Reference Chart, Doug G. Overhults, Sam Mcneill

Agricultural Engineering Extension Updates

No abstract provided.

A Mathematical Model For The Fate Of Hazardous Substances In Soil: Model Description And Experimental Results, W. Greeney, C. Caupp, Ronald C. Sims

Biological Engineering Faculty Publications

A mathematical model (VIP) was developed and implemented for evaluating the fate of a hazardous substance in the unsaturated zone of the soil. The model simulates vadose zone processes including volatilization, degradation, adsorption/desorption, advection, and dispersion. Four physical phases in the vadose zone are considered including water, oil, soil grains, and soil-pore air (unsaturated pore space). The Vadose Zone Interactive Processes (VIP) model is appropriate for sites under RCRA and CERCLA (Superfund) categorization since site-specific soil-waste processes affecting transport of hazardous chemicals through the vadose zone are incorporated in the model. A RCRA land treatment system was chosen as the …

The Effect Of Temperature On Polycyclic Aromatic Hydrocarbon Persistence In An Unacclimated Agricultural Soil, M. P. Coover, Ronald C. Sims

Biological Engineering Faculty Publications

A laboratory study was conducted to investigate the effect of temperature on the persistence of polycyclic aromatic hydrocarbons (PAHs) incubated in an unacclimated agricultural sandy loam soil. Soil microcosms were spiked with 16 priority pollutant PAHs and placed in incubation chambers at 10, 20, and 30°C. Triplicate sets of microcosms at each temperature were periodically removed from incubation over the 240 day study period and solvent extracted. Concentrations of PAHs in the soil were determined by HPLC analysis of the extracts. Substantial loss of three-ring compounds was observed at all temperatures whereas there was very little apparent loss of five …

Quinoline Sorption On Na-Montmorillonite: Contributions Of The Protonated And Neutral Species, Calvin C. Ainsworth, John M. Zachara, Ron L. Schmidt

US Department of Energy Publications

Dilute aqueous solutions of quinoline were contacted with Na-montmorillonite to elucidate the sorption process of the neutral and protonated species. Sorption occurs via a combination of ion exchange and molecular adsorption and yields S-type isotherms. Exchange between the quinolinium ion (QH⁺ and Na can be described by means of Vanselow selectivity coefficients and a thermodynamic exchange constant (K_ex). Due to the apparent adsorption of the neutral species at high mole fractions (x) of the solid phase, the thermodynamic standard state was defined as 0.5 mole fraction. The selectivity at pH ~4.95 of the QH⁺ species over …

Chromate Adsorption On Amorphous Iron Oxyhydroxide In The Presence Of Major Groundwater Ions, John M. Zachara, Donald Girvln, Ronald Schmidt, C. Thomas Resch

US Department of Energy Publications

Chromate adsorption on amorphous iron oxyhydroxide was investigated in dilute iron suspensions as a single solute and in solutions of increasing complexity containing CO₂ (g), SO₄^2-(aq), H₄Si0₄(aq), and cations [K⁺, Mg²⁺, Ca²⁺(aq)]. In paired-solute systems (e.g., CrO₄^2- =H₂CO₃*), anionic cosolutes markedly reduce CrO₄^2- adsorption through a combination of competitive and electrostatic effects, but cations exert no appreciable influence. Additionally, H4Si04 exhibits a strong time-dependent effect: CrO₄^2- adsorption is greatly decreased with increasing H₄SiO_{4 …}

Applications Of The Semiclassical Spectral Method To Nuclear, Atomic, Molecular, And Polymeric Dynamics, M. L. Koszykowski, G. A. Pfeffer, D. W. Noid

US Department of Energy Publications

Nonlinear dynamics plays a dominant role in a variety of important problems in chemical physics. Examples are unimolecular reactions, infrared multiphoton decomposition of molecules, the pumping process of the gamma ray laser, dissociation of vibrationally excited state-selected van der Waals’s complexes, and many other chemical and atomic processes. The present article discusses recent theoretical studies on the quasi-periodic and chaotic dynamical aspects of vibrational-rotational states of atomic, nuclear, and molecular systems using the semiclassical spectral method (SSM). We note that the coordinates, momenta, and so on, are found using classical mechanics in the studies included in this review. Consequently, certain …

The Rate Of Benzo[A]Pyrene Apparent Loss In A Natural And Manure Amended Clay Loam Soil, M. P. Coover, Ronald C. Sims

Biological Engineering Faculty Publications

A study was conducted to evaluate the rate of Benzo[a]pyrene apparent loss from a previously uncontaminated agricultural clay loam soil and to determine the effect of cow manure, as organic substrate amendment, on B[a]P apparent loss. Soil microcosms were spiked with 10 μg/g B[a]P and incubated at 20°C. Triplicate sets of microcosms were periodically removed from incubation and solvent extracted. Concentrations of B[a]P in the soil were determined by HPLC analysis of the extracts. Under the conditions of this study manure was an ineffective amendment for increasing the rate of B[a]P apparent loss in the Durant clay loam soil. In …