Effect of welding position on porosity formation in aluminum alloy welds

Program investigates the effects of varied welding positions on weld qualities. Progressive changes in bead geometry occur as the weld plane angle is varied from upslope to downslope. The gravitational effect on the weld puddle varies greatly with welding position

Losses causes by and control of important seed-borne virus diseases affecting productivity of annual pasture legumes.

Trial90V1 and 90W1 Assessment of pasture productivity in subterranean clover pastures infected with SCMV. Location: Woogenellup, Vasse and Wokalup. These trials measure SCMV disease progress, herbage and seed production losses in Woogenellup pasture swards which are: (i) initially artificially infected by using infected transplants in the first year; and ii) naturally infected via seed transmission of the virus in year two. Trials are grazed by sheep throughout the season, maintaining the pasture height at less than 20 cm. Trial 90PE5 Assessment of sensitivity/resistance to subterranean clover mottle virus in selected subterranean clover cultivars. Location: Pemberton Subterranean clover cultivars, recommended for growing in areas where SCMV has been found, and known to be susceptible to the SCMV following sap-inoculation in the glasshouse were assessed for susceptibility to SCMV. Included are measurements of herbage and seed productivity loss due to the disease. Seed transmission of SCMV in newly germinated progeny seedling from infected plants is also examined. Trial 89GL17 The effect of AMV on nodulation of burr medic. To date, there is no information comparing virus concentrations in the nodules and shoots to determine preferred sites for virus multiplication or whether virus concentration declines in shoots and nodules as plants age. The aims of this experiment were to examine which of these factors limited nitrogen fixation in burr medic nodules infected with \u27AMV

Rejections of sheep and lamb carcasses are costly

A 1976 survey of more than 48 000 sheep and 25 000 lambs slaughtered at two of Western Australia\u27s export abattoirs has indicated a high rejection rate for W.A. carcasses. Rejections may be for disfiguring, blemishes requiring trimming or for diseases which can lead to condemnation. Savings that producers can make by simple management changes, could thus save the industry $3.12 million a year. Reduction in other causes of rejection or further reduction in some of those mentioned id feasible but requires more research and may be more difficult to achieve

Welding of AM350 and AM355 steel

A series of tests was conducted to establish optimum procedures for TIG welding and heat treating of AM350 and AM355 steel sheet in thicknesses ranging from 0.010 inch to 0.125 inch. Statistical analysis of the test data was performed to determine the anticipated minimum strength of the welded joints

Diagnosing pregnancy in sheep : the \u27Scanopreg\u27

The Scanopreg , an ultrasonic machine for diagnosing pregnancy in sheep, is effective as early as eight to nine weeks of pregnancy, and could therefore be a useful management tool

A survey of drench resistance in sheep worms

Sheep worms which are resistant to chemical drenches have been detected with increasing freuency is Western Australia\u27s south-western farming areas between 977 and 1980. These worms have anthelmintic resistance and such genetis resistance puts essential internal parasite control practices at risk. This prompted veterinarians in the Esperance, Albany, Bunbury, Geraldton and Northam areas to survey farms to determine the prevalence of resistance to drenches and to define those sheep management practices which encourage its development. This article describes the survey which was conducted to assess the extent of drench resistance, what causes its build-up and how it can be controlled by using a combination of drenching programme changes and sheep management practices. It has been estimated that drench resistance alone could cost the State\u27s sheep industry $4 million to$6 million a year in lost production, and, as shis survey shows, there is potential for far greater costs if resistance continues to increase

Experimental summary 1988

1. Disease complexes in wheat field screening trials. 2. Glasshouse screening for wheat leaf disease resistance. 3. Effect of phosphate, stand density and Rovral on Pleiochaeta setosa in lupins. 4. Genotype and rvral for Pleichaeta setosa in lupins. 5. Control of Septoria in early sown wheat. 6. Controlling Pyrenophora graminea leaf stripe in barley. 7. Effect of environment on leaf stripe in barley. 8. Unusual seed quality problems

Cost to Primary Care Practices of Responding to Payer Requests for Quality and Performance Data

PURPOSE We wanted to determine how much it costs primary care practices to participate in programs that require them to gather and report data on care quality indicators

Drained cavity expansion analysis with a unified state parameter model for clay and sand

This paper presents an analytical solution for drained expansion in both spherical and cylindrical cavities with a unified state parameter model for clay and sand (CASM). The solution developed here provides the stress and strain fields during the expansion of a cavity from an initial to an arbitrary final radius. Small strains are assumed for the elastic region and large strains are applied to soil in the plastic region by using logarithmic strain definitions. Since its development, the unified CASM model has been demonstrated by many researchers to be able to capture the overall soil behaviour for both clay and sand under both drained and undrained loading conditions. In this study, the CASM model is used to model soil behaviour whilst a drained cavity expansion solution is developed with the aid of an auxiliary variable. This is an extension of the undrained solution presented by the authors in 2017. The parametric study investigates the effects of various model constants including the stress-state coefficient and the spacing ratio on soil stress paths and cavity expansion curves. Both London clay and Ticino sand are modelled under various initial stress conditions and initial state parameters. The newly developed analytical solution highlights the potential applications in geotechnical practice (e.g., for the interpretation of cone penetration test data) and also provides useful benchmarks for numerical simulations of cavity expansion problems in critical state soils

Crop Updates - 2003 Oilseeds

This session covers fifteen papers from different authors ACKNOWLEDGMENTS VARIETIES Large scale canola varietal evaluation in WA, Peter Nelson, Oilseeds WA Performance of IT and TT canola varieties in the medium and high rainfall agzones of WA 2001-02, Graham Walton, Hasan Zaheer and Paul Carmody, Department of Agriculture QUALITY Reproductive biology, cotyledon development and oil accumulation in canola, J.A. Fortescue and D.W. Turner, School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia Plant and environmental factors affecting oil concentration in canola – a mini-review, D.W. Turner, School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia Potential benefits from interspecific crosses between canola and ‘near canola’ quality Indian mustard, Janet Wroth, School of Plant Biology, The University of Western Australia (UWA), Wallace Cowling, School of Plant Biology, UWA and CBWA Pty Ltd, Anh-Van Pham, School of Mathematics and Statistics, UWA NUTRITION, AGRONOMY AND MACHINERY Timing of nitrogen application for producing canola grain and oil, R. F. Brennan, Department of Agriculture Managing canola for soil type and moisture stress, Paul Carmody and Hasan Zaheer Department of Agriculture Machinery lessons from 2002 – canola establishment, Glen Riethmuller, Greg Hamilton and Jo Hawksley, Department of Agriculture Machinery lessons from 2002 – harvesting short crops, Glen Riethmuller, Department of Agriculture Does increasing canola seeding rate reduce the competitiveness of grass weeds? Zaicou-Kunesch, C.M., Zaheer, S.H. and Eksteen, D, Department of Agriculture PESTS AND DISEASES Aphid damage to canola – not all cultivars are equal, Françoise A. Berlandier and Christiaan Valentine, Department of Agriculture Should we be worried about developing insecticide resistance in aphids? Owain Edwards, CSIRO Entomology Benefits provided by treating canola seed with imidacloprid seed dressing, Roger Jones, Brenda Coutts, Lisa Smith and Jenny Hawkes, Department of Agriculture, and Centre for Legumes in Mediterranean Agriculture Blackleg levels in canola in 2002, Ravjit Khangura1, Moin Salam1, Art J Diggle1 and Martin J Barbetti1,2 1Department of Agriculture, 2University of Western Australia DBM in canola, Kevin Walden, Department of Agricultur