38 research outputs found
Tropical transition of Hurricane Chris (2012) over the North Atlantic Ocean: A multi-scale investigation of predictability
Tropical cyclones that evolve from a non-tropical origin may pose a special
challenge for predictions, as they often emerge at the end of a multi-scale
cascade of atmospheric processes. Climatological studies have shown that the
'tropical transition' (TT) pathway plays a prominent role in cyclogenesis, in
particular over the North Atlantic Ocean. Here we use operational European
Centre for Medium-Range Weather Forecasts ensemble predictions to investigate
the TT of North Atlantic Hurricane Chris (2012), whose formation was preceded
by the merger of two potential vorticity (PV) maxima, eventually resulting in
the storm-inducing PV streamer. The principal goal is to elucidate the dynamic
and thermodynamic processes governing the predictability of cyclogenesis and
subsequent TT. Dynamic time warping is applied to identify ensemble tracks that
are similar to the analysis track. This technique permits small temporal and
spatial shifts in the development.
The formation of the pre-Chris cyclone is predicted by those members that
also predict the merging of the two PV maxima. The position of the storm
relative to the PV streamer determines whether the pre-Chris cyclone follows
the TT pathway. The transitioning storms are located inside a favorable region
of high equivalent potential temperatures that result from a warm seclusion
underneath the cyclonic roll-up of the PV streamer. A systematic investigation
of consecutive ensemble forecasts indicates that forecast improvements are
linked to specific events, such as the PV merging. The present case exemplifies
how a novel combination of Eulerian and Lagrangian ensemble forecast analysis
tool allows to infer physical causes of abrupt changes in predictability.Comment: 27 pages, 15 figures, supplementary material; submitted to Monthly
Weather Revie
Tropical Transition of Hurricane Chris (2012) over the North Atlantic Ocean: A Multi-Scale Investigation of Predictability
Tropical cyclones that evolve from a non-tropical origin may pose a special
challenge for predictions, as they often emerge at the end of a multi-scale
cascade of atmospheric processes. Climatological studies have shown that the
'tropical transition' (TT) pathway plays a prominent role in cyclogenesis, in
particular over the North Atlantic Ocean. Here we use operational European
Centre for Medium-Range Weather Forecasts ensemble predictions to investigate
the TT of North Atlantic Hurricane Chris (2012), whose formation was preceded
by the merger of two potential vorticity (PV) maxima, eventually resulting in
the storm-inducing PV streamer. The principal goal is to elucidate the dynamic
and thermodynamic processes governing the predictability of cyclogenesis and
subsequent TT. Dynamic time warping is applied to identify ensemble tracks that
are similar to the analysis track. This technique permits small temporal and
spatial shifts in the development.
The formation of the pre-Chris cyclone is predicted by those members that
also predict the merging of the two PV maxima. The position of the storm
relative to the PV streamer determines whether the pre-Chris cyclone follows
the TT pathway. The transitioning storms are located inside a favorable region
of high equivalent potential temperatures that result from a warm seclusion
underneath the cyclonic roll-up of the PV streamer. A systematic investigation
of consecutive ensemble forecasts indicates that forecast improvements are
linked to specific events, such as the PV merging. The present case exemplifies
how a novel combination of Eulerian and Lagrangian ensemble forecast analysis
tool allows to infer physical causes of abrupt changes in predictability.Comment: 27 pages, 15 figures, supplementary material; submitted to Monthly
Weather Revie
Sheep Updates 2006 - part 3
This session covers six papers from different authors:
GRAZING
1. Making better use of clover, Karen Venning and Andrew Thompson, Department of Primary Industries, Victoria
2. Grazing systems demonstration to optimise pasture utilisation and stocking rate, Mike Hyder, Sue-Ellen Shaw, Kelly Hill and Ron McTaggart, Department of Agriculture and Food Western Australia.
3. Know your audience to increase their rate of practice change - Lifetime Wool as an example, Gus Rose, Department of Agriculture and Food Western Australia, Carolyn Kabore, Kazresearch
REPRODUCTION
4. Lifetime Wool - Ewe Management Guidlines, Mandy Curnow, Department of Agriculture and Food Western Australia
5. Achieving the best reproductive performance from your hoggets, Kenyon PR, Morris ST, West DM, Perkins NR, Pinchbeck GL., Institute of Veterinary, Animal and Biomedical Sciences, Massey University, New Zealand.
6. Lifetime Wool: Twin futures, Dr Ralph Behrendt, Department of Primary Industries, Victori
The âGrey Zoneâ cold air outbreak global model intercomparison: A cross evaluation using large-eddy simulations
A stratocumulus-to-cumulus transition as observed in a cold air outbreak over the North Atlantic Ocean is compared in global climate and numerical weather prediction models and a large-eddy simulation model as part of the Working Group on Numerical Experimentation âGrey Zoneâ project. The focus of the project is to investigate to what degree current convection and boundary layer parameterizations behave in a scale-adaptive manner in situations where the model resolution approaches the scale of convection. Global model simulations were performed at a wide range of resolutions, with convective parameterizations turned on and off. The models successfully simulate the transition between the observed boundary layer structures, from a well-mixed stratocumulus to a deeper, partly decoupled cumulus boundary layer. There are indications that surface fluxes are generally underestimated. The amount of both cloud liquid water and cloud ice, and likely precipitation, are under-predicted, suggesting deficiencies in the strength of vertical mixing in shear-dominated boundary layers. But also regulation by precipitation and mixed-phase cloud microphysical processes play an important role in the case. With convection parameterizations switched on, the profiles of atmospheric liquid water and cloud ice are essentially resolution-insensitive. This, however, does not imply that convection parameterizations are scale-aware. Even at the highest resolutions considered here, simulations with convective parameterizations do not converge toward the results of convection-off experiments. Convection and boundary layer parameterizations strongly interact, suggesting the need for a unified treatment of convective and turbulent mixing when addressing scale-adaptivity
Crop Updates 2006 - Katanning
This session covers sixteen papers from different authors
2006 SEASONAL OUTLOOK, David Stephens and Michael Meuleners, Department of Agriculture
Review of climate model summaries reported in the Department of Agricultureâs growing season outlooks, Meredith Fairbanks, Department of Agriculture
Farmers commodity outlook 2006, Thomas Schulz, Department of Agriculture
Why is salinity such a difficult problem for plant breeders? T J Flowers, TD Colmer, University of Western Australia
Matching nitrogen supply to wheat demand in 2005, Narelle Simpson, Ron McTaggart, Wal Anderson, Lionel Martin and Dave Allen, Department of Agriculture
Wheat varieties in 2006, Brenda Shackley, Department of Agriculture
Performance of dwarf potential milling oat varieties in Western Australian environments, Raj Malik and Kellie Winfield, Department of Agriculture
Field pea lessons for 2006, Rodger Beermir, Department of Agriculture
Better returns from Durum wheat, Shahahan Miyan, Department of Agriculture
Summer weeds can reduce grain yield and protein, Dr. Abul Hashem, Department of Agriculture, Dr Shahab Pathan, Department of Agriculture, Vikki Osten, Queensland Department of Primary Industries and Fisheries
Management of Summer Weeds, Alex Douglas, Department of Agriculture
Frost or Friction, Garren Knell, Steve Curtin, Wade Longmuir, Consult Ag Pty Ltd
PROFITING FROM MARGINAL LAND SEMINAR
Producing Bio-Diesel and rubber from marginal land?? Dr Henry Brockman, Department of Agriculture
SGSL Producer network â on ground implementation of saltbush based pastures, Justin Hardy, Arjen Ryder, John Paul Collins and Jessica Johns, Department of Agriculture
Enhancing the profitability of âEdeniaâ using saltbush and perenials, SGSL Producer case study, John Pepall, Jinkaâs Hill LCDC
Investment in saltland pastures, Allan Herbert, Department of Agricultur
Crop Updates 2004 - Cereals
This session covers twenty eight papers from different authors:
PLENARY
1. Declining profitability in continuous cropping systems. Is more wheat the answer on Duplex soil? Dr Wal Anderson, Department of Agriculture
2. Disease implications of extending the wheat phase in low-medium rainfall areas, Dr Vivian Vanstone and Dr Robert Loughman, Department of Agriculture
3. Prolonged wheat phase on duplex soils â where do weeds set the boundary? Vanessa Stewart, Department of Agriculture
WHEAT AGRONOMY
4. Management of small grain screenings in wheat, Dr Wal Anderson and Dr Darshan Sharma, Department of Agriculture
5. Agronomic responses of new wheat varieties, Christine Zaicou-Kunesch, Dr Darshan Sharma, Brenda Shackley, Dr Mohammad Amjad, Dr Wal Anderson and Steve Penny,Department of Agriculture
6. Managing wheat yield reduction from wide rows, Dr Mohammad Amjad and Dr Wal Anderson, Department of Agriculture
7. Row spacing and stubble effect on wheat yield and ryegrass seed set, Glen Riethmuller, Department of Agriculture
8. Grain protein management â lessons learnt on the south coast, Jeremy Lemon, Department of Agriculture
9. Unravelling the mysteries of optimum seed rates, Dr Wal Anderson, Dr Darshan Sharma, Brenda Shackley and Mario DâAntuono, Department of Agriculture
10. Agronomic features for growing better wheat â south east agricultural region 2003, Dr Mohammad Amjad, Veronika Reck and Ben Curtis, Department of Agriculture
11. Agronomic responses of new wheat varieties â great southern agricultural region 2003, Brenda Shackley and Judith Devenish, Department of Agriculture
12. Variety specific responses of new wheat varieties â central agricultural region 2003, Dr Darshan Sharma and Dr Wal Anderson, Department of Agriculture
13. Agronomic responses of new wheat varieties â northern agricultural region 2003, Christine Zaicou-Kunesch, Melaine Kupsch and Anne Smith, Department of Agriculture
BARLEY AND OAT AGRONOMY
14. Gairdner for high rainfall â where does Baudin fit in? Blakely Paynter, Roslyn Jettnerand Leanne Schulz, Department of Agriculture
15. Oaten hay â varieties and agronomy, Blakely Paynter, Jocelyn Ball and Tom Sweeny, Department of Agriculture
NUTRITION
16. In-furrow fungicide applications in liquid fertiliser, Dr Stephen Loss, CSBP Ltd
17. Elemental sulphur as a fertiliser source in Western Australia, Ashleigh Brooks1A, Justin Fuery2, Geoff Anderson3 and Prof Zed Rengel1,1UWA, 2Summit FertilizerFertilisers and 3Department of Agriculture
18. Genetic variation in potassium efficiency of barley, Paul Damon and Prof. Zed Rengel, Faculty of Natural and Agricultural Sciences, UWA
19. Managing protein through strategic N applications, Eddy Pol and Dr Stephen Loss, CSBP Ltd
20. Nitrogen management for wheat in high rainfall cropping areas, Narelle Hill1, Ray Tugwell1, Dr Wal Anderson1, Ron McTaggart1and Nathan Moyes2, 1Department of Agriculture and 2Landmark
21. Flag smut resistance in current WA wheat varieties, John Majewski and Dr Manisha Shankar, Department of Agriculture
22. Rust resistance update for wheat varieties in WA, Dr Manisha Shankar, John Majewski and Jamie Piotrowski, Department of Agriculture
PESTS AND DISEASES
23. Stripe rust in WA â where was it and what can we learn from 2003? Dr Robert Loughman and Ciara Beard, Department of Agriculture
24. Foliar disease management â a key factor in the adoption of Baudin and Hamlin barley, Dr Kithsiri Jayasena, Dr Rob Loughman, Kazue Tanaka and Grey Poulish, Department of Agriculture
25. Validating aphid and virus risk forecasts for cereals, Dr Debbie Thackray, Rohan Prince and Dr Roger Jones, Department of Agriculture and Centre for Legumes in Mediterranean Agriculture
HARVESTING
26. Swathing Gairdner barley at 30% moisture, Peter NelsonÂč and Nigel MetzÂČ, ÂčCooperative Bulk Handling and ÂČ Fitzgerald Biosphere Group
MODELLING
27. Development of a web based grower decision aid application for cereal growers, Dr Leisa Armstrong1, Yee Leong (Alex) Yung1and Dr Moin Salam2
1School of Computer and Information Science, Edith Cowan University; and
2Department of Agriculture
28. Wheat varieties updated in âFlowering Calculatorâ â a model predicting flowering time, Brenda Shackley, Dr David Tennant, Dr Darshan Sharma and Christine ZaicouâKunesch, Department of Agricultur
The North Atlantic Waveguide and Downstream Impact Experiment
The North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX) explored the impact of diabatic processes on disturbances of the jet stream and their influence on downstream high-impact weather through the deployment of four research aircraft, each with a sophisticated set of remote sensing and in situ instruments, and coordinated with a suite of ground-based measurements. A total of 49 research flights were performed, including, for the first time, coordinated flights of the four aircraft: the German High Altitude and Long Range Research Aircraft (HALO), the Deutsches Zentrum fĂŒr Luft- und Raumfahrt (DLR) Dassault Falcon 20, the French Service des Avions Français InstrumentĂ©s pour la Recherche en Environnement (SAFIRE) Falcon 20, and the British Facility for Airborne Atmospheric Measurements (FAAM) BAe 146. The observation period from 17 September to 22 October 2016 with frequently occurring extratropical and tropical cyclones was ideal for investigating midlatitude weather over the North Atlantic. NAWDEX featured three sequences of upstream triggers of waveguide disturbances, as well as their dynamic interaction with the jet stream, subsequent development, and eventual downstream weather impact on Europe. Examples are presented to highlight the wealth of phenomena that were sampled, the comprehensive coverage, and the multifaceted nature of the measurements. This unique dataset forms the basis for future case studies and detailed evaluations of weather and climate predictions to improve our understanding of diabatic influences on Rossby waves and the downstream impacts of weather systems affecting Europe
Crop Updates 2005 - Katanning
This session covers twenty five papers from different authors
KEYNOTE
How Farmers Can Work Together for a More Sustainable and Profitable Business, Brian McAlpine Farmer, Nuffield Scholar
GENERAL
2005 Seasonal Outlook, David Stephens and Nicola Telcik, Department of Agriculture
Essentials for cereal leaf disease management, K. Jayasena, R. Loughman, G. Thomas, C. Beard, and B. Paynter, Department of Agriculture
Benefits to the grower of grain licensing, Colin Mann, Grain Licensing Authority SOIL & NUTRIENTS
The effect of higher nitrogen fertiliser prices on rotation and fertiliser strategies in cropping systems, Ross Kingwell, Department of Agriculture
Effect of stubble burning and seasonality on microbial processes and nutrient cycling, Francis Hoyle, University of Western Australia
Soil Biology and Crop Production in Western Australian Farming Systems, D.V. Murphy, N. Milton, M. Osman, F.C. Hoyle, L.K Abbott, W.R. Cookson and S. Darmawanto, University of Western Australia
Nutrient Management to get optimal production, Bill Bowden, Department of Agriculture
OTHER CROPS
Which malting barley variety and why? Blakely Paynter, Department of Agriculture
KASPA AND OTHER NEW PULSE VARIETIES, 1. New Pulse varieties and where they fit in, K. Regan, P. White, Department of Agriculture & CLIMA, K. Siddique, CLIMA, K. Adhikari, Department of Agriculture & CLIMA, M. Harries, CLIMA
Kaspa in the WA Grain Belt 2003-2004, Ian Pritchard, Department of Agriculture
New annual pastures for Mediterranean farming systems, Angelo Loi, Phil Nichols, Clinton Revell & David Ferris, Department of Agriculture
Challenging herbicide resistant ryegrass, Bill Roy, Agricultural Consulting & Research Services Pty.Ltd
WEED MANAGEMENT
Ingest, incinerate or invert? The proâs and conâs of 3 weed seed removal tactics, Sally Peltzer1, Dave Minkey1 and Michael Walsh2 Department of Agriculture 1 and Western Australian Herbicide Resistance lnitiative2
A good use guide for pre-emergent herbicides, Alexandra Douglas, Department of Agriculture
OTHER USEFUL INFORMATION
17.Growing season outlook, Meredith Fairbanks, Ian Foster, Geraldine Pasqual, David Stephens, Nicola Telcik, David Tennant, Department of Agriculture
18. Status Of Department Of Agriculture Western Australia Crop Varieties
19. Seed Licensee Details
20. Gene technology for growers. What is it? How does it Work? Belinda Barr, Australian Centre for Plant Functional Genomics, Dr Heather Bray, Molecular Plant Breeding Cooperative Research Centre.
21. Agronomic package for EGA Eagle Rock, Steve Penny, Department of Agriculture
22. Nutrient timing and requirements for increased crop yields in the high rainfall cropping zone, Narelle Hill, Ron McTaggart, Dr. Wal Anderson and Ray Tugwell Department of Agriculture
23. Insect contamination of cereal grain at harvest, Svetlana Micic and Phil Michael, Department of Agriculture
24. Crop leftovers: whatâs in stubble for sheep? Roy Butler and Keith Croker, Department of Agriculture
25. Mandelup â Narrow-leafed lupi
Crop Updates 2006 - Cereals
This session covers twenty nine papers from different authors:
PLENARY
1. The 2005 wheat streak mosaic virus epidemic in New South Wales and the threat posed to the Western Australian wheat industry, Roger Jones and Nichole Burges, Department of Agriculture
SOUTH COAST AGRONOMY
2. South coast wheat variety trial results and best options for 2006, Mohammad Amjad, Ben Curtis and Wal Anderson, Department of Agriculture
3. Dual purpose winter wheats to improve productivity, Mohammad Amjad and Ben Curtis, Department of Agriculture
4. South coast large-scale premium wheat variety trials, Mohammad Amjad and Ben Curtis, Department of Agriculture
5. Optimal input packages for noodle wheat in Dalwallinu â Liebe practice for profit trial, Darren Chitty, Agritech Crop Research and Brianna Peake, Liebe Group
6. In-crop risk management using yield prophetÂź, Harm van Rees1, Cherie Reilly1, James Hunt1, Dean Holzworth2, Zvi Hochman2; 1Birchip Cropping Group, Victoria; 2CSIRO, Toowoomba, Qld
7. Yield ProphetÂź 2005 â On-line yield forecasting, James Hunt1, Harm van Rees1, Zvi Hochman2,Allan Peake2, Neal Dalgliesh2, Dean Holzworth2, Stephen van Rees1, Trudy McCann1 and Peter Carberry2; 1Birchip Cropping Group, Victoria; 2CSIRO, Toowoomba, Qld
8. Performance of oaten hay varieties in Western Australian environments, Raj Malik and Kellie Winfield, Department of Agriculture
9. Performance of dwarf potential milling varieties in Western Australian environments, Kellie Winfield and Raj Malik, Department of Agriculture
10. Agronomic responses of new wheat varieties in the Southern agricultural region of WA, Brenda Shackley and Judith Devenish, Department of Agriculture
11. Responses of new wheat varieties to management factors in the central agricultural region of Western Australia, Darshan Sharma, Steve Penny and Wal Anderson,Department of Agriculture
12. Sowing time on wheat yield, quality and $ - Northern agricultural region, Christine Zaicou-Kunesch, Department of Agriculture
NUTRITION
13.The most effective method of applying phosphorus, copper and zinc to no-till crops, Mike Bolland and Ross Brennan, Department of Agriculture
14. Uptake of K from the soil profile by wheat, Paul Damon and Zed Rengel, Faculty of Natural and Agricultural Sciences, University of Western Australia
15. Reducing nitrogen fertiliser risks, Jeremy Lemon, Department of Agriculture
16. Yield ProphetÂź and canopy management, Harm van Rees1, Zvi Hochman2, Perry Poulton2, Nick Poole3, Brooke Thompson4, James Hunt1; 1Birchip Cropping Group, Victoria; 2CSIRO, Toowoomba, Qld; 3Foundation for Arable Research, New Zealand; 4Cropfacts, Victoria
17. Producing profits with phosphorus, Stephen Loss, CSBP Ltd, WA
18. Potassium response in cereal cropping within the medium rainfall central wheatbelt, Jeff Russell1, Angie Roe2 and James Eyres2, Department of Agriculture1, Farm Focus Consultants, Northam2
19. Matching nitrogen supply to wheat demand in the high rainfall cropping zone, Narelle Simpson, Ron McTaggart, Wal Anderson, Lionel Martin and Dave Allen, Department of Agriculture
DISEASES
20. Comparative study of commercial wheat cultivars and differential lines (with known Pm resistance genes) to powdery mildew response, Hossein Golzar, Manisha Shankar and Robert Loughman, Department of Agriculture
21. On farm research to investigate fungicide applications to minimise leaf disease impacts in wheat â part II, Jeff Russell1, Angie Roe2and James Eyres2, Department of Agriculture1, and Farm Focus Consultants, Northam2
22. Disease resistance update for wheat varieties in WA, Manisha Shankar, John Majewski, Donna Foster, Hossein Golzar, Jamie Piotrowski, Nicole Harry and Rob Loughman, Department of Agriculture
23. Effect of time of stripe rust inoculum arrival on variety response in wheat, Manisha Shankar, John Majewski and Rob Loughman, Department of Agriculture
24. Fungicide seed dressing management of loose smut in Baudin barley, Geoff Thomas and Kith Jayasena, Department of Agriculture
PESTS
25. How to avoid insect contamination in cereal grain at harvest, Svetlana Micic, Paul Matson and Tony Dore, Department of Agriculture
ABIOTIC
26. Environment â is it as important as variety in sprouting tolerance? Thomas (Ben) Biddulph1, Dr Daryl Mares1, Dr Julie Plummer1 and Dr Tim Setter2, School of Plant Biology, University of Western Australia1 and Department of Agriculture2
27. Frost or fiction, Garren Knell, Steve Curtin and Wade Longmuir, ConsultAg Pty Ltd, WA
28. High moisture wheat harvesting in Esperance 2005, Nigel Metz, South East Premium Wheat Growers Association (SEPWA) Projects Coordinator, Esperance, WA
SOILS
28. Hardpan penetration ability of wheat roots, Tina Botwright Acuña and Len Wade, School of Plant Biology, University of Western Australia
MARKETS
29. Crop shaping to meet predicted market demands for wheat in the 21st Century, Cindy Mills and Peter Stone,Australian Wheat Board, Melbourn
Crop Updates 2005 - Cereals
This session covers thirty six papers from different authors:
WHEAT AGRONOMY
1. Optimum sowing time of new wheat varieties in Western Australia, Darshan Sharma, Brenda Shackley, Mohammad Amjad, Christine M. Zaicou-Kunesch and Wal Anderson, Department of Agriculture
2. Wheat varieties updated in âFlowering Calculatorâ: A model predicting flowering time, B. Shackley, D. Tennant, D. Sharma and C.M. Zaicou-Kunesch, Department of Agriculture
3. Plant populations for wheat varieties, Christine M. Zaicou-Kunesch, Wal Anderson, Darshan Sharma, Brenda Shackley and Mohammad Amjad, Department of Agriculture
4. New wheat cultivars response to fertiliser nitrogen in four major agricultural regions of Western Australia, Mohammad Amjad, Wal Anderson, Brenda Shackley, Darshan Sharma and Christine Zaicou-Kunesch, Department of Agriculture
5. Agronomic package for EGA Eagle Rock, Steve Penny, Department of Agriculture
6. Field evaluation of eastern and western wheats in large-scale farmerâs trials, Mohammad Amjad, Ben Curtis and Veronika Reck, Department of Agriculture
7. New wheat varieties for a changing environment, Richard Richards, CSIRO Plant Industry; Canberra
8. Farmers can profitably minimise exposure to frost! Garren Knell, Steve Curtin and David Sermon, ConsultAg
9. National Variety Trials, Alan Bedggood, Australian Crops Accreditation System; Horsham
10. Preharvest-sprouting tolerance of wheat in the field, T.B. Biddulph1, T.L. Setter2, J.A. Plummer1 and D.J. Mares3; 1Plant Biology; FNAS, University of Western Australia; 2Department of Agriculture, 3School of Agriculture and Wine, University of Adelaide
11. Waterlogging induces high concentration of Mn and Al in wheat genotypes in acidic soils, H. Khabaz-Saberi, T. Setter, I. Waters and G. McDonald, Department of Agriculture
12. Agronomic responses of new wheat varieties in the Northern Agricultural Region, Christine M. Zaicou-Kunesch and Wal Anderson, Department of Agriculture
13. Agronomic responses of new wheat varieties in the Central Agricultural Region of WA, Darshan Sharma, Steve Penny and Wal Anderson, Department of Agriculture
14. EGA Eagle Rock tolerance to metribuzin and its mixtures, Harmohinder Dhammu, David Nicholson and Chris Roberts, Department of Agriculture
15. Herbicide tolerance of new bread wheats, Harmohinder Dhammu1 and David Nicholson2, Department of Agriculture
NUTRITION
16. The impact of fertiliser placement, timing and rates on nitrogen-use efficiency, Stephen Loss, CSBP Ltd
17. Cereals deficient in potassium are most susceptible to some leaf diseases, Ross Brennan and Kith Jayasena, Department of Agriculture
18. Responses of cereal yields to potassium fertiliser type, placement and timing, Eddy Pol, CSBP Limited
19. Sulphate of Potash, the potash of choice at seeding, Simon Teakle, United Farmers Co-operative
20. Essential disease management for successful barley production, K. Jayasena, R. Loughman, C. Beard, B. Paynter, K. Tanaka, G. Poulish and A. Smith, Department of Agriculture
21. Genotypic differences in potassium efficiency of wheat, Paul Damon and Zed Rengel, Faculty of Natural and Agricultural Sciences, University of Western Australia
22. Genotypic differences in potassium efficiency of barley, Paul Damon and Zed Rengel, Faculty of Natural and Agricultural Sciences, University of Western Australia
23. Investigating timing of nitrogen application in wheat, Darshan Sharma and Lionel Martin, Department of Agriculture, and Muresk Institute of Agriculture, Curtin University of Technology
24. Nutrient timing requirements for increased crop yields in the high rainfall cropping zone, Narelle Hill, Ron McTaggart, Dr Wal Anderson and Ray Tugwell, Department of Agriculture
DISEASES
25. Integrate strategies to manage stripe rust risk, Geoff Thomas, Robert Loughman, Ciara Beard, Kith Jayasena and Manisha Shankar, Department of Agriculture
26. Effect of primary inoculum level of stripe rust on variety response in wheat, Manisha Shankar, John Majewski and Robert Loughman, Department of Agriculture
27. Disease resistance update for wheat varieties in WA, M. Shankar, J.M. Majewski, D. Foster, H. Golzar, J. Piotrowski and R. Loughman, Department of Agriculture
28. Big droplets for wheat fungicides, Rob Grima, Agronomist, Elders
29. On farm research to investigate fungicide applications to minimise leaf disease impacts in wheat, Jeff Russell and Angie Roe, Department of Agriculture, and Farm Focus Consultants
PESTS
30. Rotations for nematode management, Vivien A. Vanstone, Sean J. Kelly, Helen F. Hunter and Mena C. Gilchrist, Department of Agriculture
31. Investigation into the adaqyacy of sealed farm silos in Western Australia to control phosphine-resistant Rhyzopertha dominica, C.R. Newman, Department of Agriculture
32.Insect contamination of cereal grain at harvest, Svetlana Micic and Phil Michael, Department of Agriculture
33. Phosure â Extending the life of phosphine, Gabrielle Coupland and Ern Kostas, Co-operative Bulk Handling
SOIL
34. Optimum combinations of ripping depth and tine spacing for increasing wheat yield, Mohammed Hamza and Wal Anderson, Department of Agriculture
35. Hardpan penetration ability of wheat roots, Tina Botwright Acuña and Len Wade, School of Plant Biology, University of Western Australia
MARKETS
36. Latin America: An emerging agricultural powerhouse, Ingrid Richardson, Food and Agribusiness Research, Rabobank; Sydne