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Full-Text Articles in Physical Sciences and Mathematics

Bioenergy And Carbon Farming Opportunities In The Pilbara, Robert Sudmeyer, Kim Brooksbank, David Rogers Dec 2016

Bioenergy And Carbon Farming Opportunities In The Pilbara, Robert Sudmeyer, Kim Brooksbank, David Rogers

Bulletins 4000 -

The Pilbara region covers 270 000 square kilometres of north-west Western Australia. Its main agricultural land use is pastoralism, with beef cattle grazing native pastures. Currently, only 24km2 is under irrigation, with irrigated fodder the principal crop, but this could expand to 100km2. This expansion has the potential to significantly broaden the economic base of the Pilbara.

Irrigation and the opportunities for changing land use and management may facilitate greater participation in the carbon economy by Pilbara land managers. Bioenergy feedstocks could be sourced from purpose-grown crops or agricultural wastes. Carbon farming activities may be facilitated by the ...


Making Better Fertiliser Decisions For Cropping Systems In Western Australia. Soil Test – Crop Response Relationships And Critical Soil Test Values And Ranges, Geoff Anderson, Ross Brennan, Richard Bell, Wen Chen Jan 2015

Making Better Fertiliser Decisions For Cropping Systems In Western Australia. Soil Test – Crop Response Relationships And Critical Soil Test Values And Ranges, Geoff Anderson, Ross Brennan, Richard Bell, Wen Chen

Bulletins 4000 -

The better fertiliser decisions for cropping project (BFDC) (2009-2012) was completed to provide comprehensive information to improve fertiliser decisions for the cropping industry in Australia (Speirs et al. 2013a). The WA component provides interpretation of results from crop nutrient application experiments for the WA cropping system, and developed a tool for estimating nutrient losses from cropping systems soils.

The BFDC-WA project aims to use the 4R principles by producing a series of bulletins on nutrient management for the cropping system of WA.


Soil Acidity : A Guide For Wa Farmers And Consultants., Chris Gazey, Stephen Davies, Ron Master Apr 2014

Soil Acidity : A Guide For Wa Farmers And Consultants., Chris Gazey, Stephen Davies, Ron Master

Bulletins 4000 -

Our first edition of Soil acidity: a guide for WA farmers and consultants in 2009 was a significant publication which brought together current knowledge on the management of soil acidity in WA in a user-friendly book. Three thousand printed copies were distributed and an interactive PDF on the Department of Agriculture and Food, Western Australia (DAFWA) website made it available to most WA farmers and consultants.

iLime is a decision tool to assist liming decisions.

Recent projects have extended our knowledge of the extent of the soil acidity problem in WA. When the first edition was published, we had good ...


Audit Of Wa Agricultural Lime Quality 2013, Chris Gazey Aug 2013

Audit Of Wa Agricultural Lime Quality 2013, Chris Gazey

Bulletins 4000 -

Applying agricultural lime is the most economical way of ameliorating low soil pH in broadscale agriculture in Western Australia (WA). In WA, agricultural lime is usually limesand from coastal sand dunes, crushed limestone from coastal deposits or crushed dolomitic lime (usually marketed as dolomite) from old lake and inland drainage systems. Other sources are Cretaceous chalk and lake bed marls.

WA agriculture is well serviced by lime suppliers, although the quality of lime varies markedly around the State, and cost does not always reflect quality as measured by neutralising value and fineness. Neutralising value and particle size distribution (fineness) are ...


Subsurface Compaction A Guide For Wa Farmers And Consultants, Stephen Davies, Alison Lacey Jan 2011

Subsurface Compaction A Guide For Wa Farmers And Consultants, Stephen Davies, Alison Lacey

Bulletins 4000 -

For plants to grow in agricultural soils, roots and emerging shoots must be able to force their way through the soil. In soils of high strength, this growth is physically restricted. High strength soils may be due to natural soil characteristics and conditions or develop as a result of agricultural practices and may be in layers or throughout the soil profile.

In agriculture, high strength soils commonly occur as a result of compaction. Compaction of agricultural soils can be in the surface (often caused by stock trampling or rain drop splatter) or in the subsurface (usually in a layer at ...


Soil Ph In Northern And Southern Areas Of The Wa Wheatbelt, Chris Gazey, Joel Andrew Jan 2009

Soil Ph In Northern And Southern Areas Of The Wa Wheatbelt, Chris Gazey, Joel Andrew

Bulletins 4000 -

More than 80% of the topsoils sampled fall below the critical surface pHCaCl2 of 5.5 in the northern and southern wheatbelt study areas, with more in the south than the north. These results confirm soil acidity is a serious concern throughout the WA wheatbelt when considered in conjunction with the more intensive analysis of current soil pH throughout the Avon River Basin (2005–2008).

With low topsoil pH, it is likely that subsurface acidity is also a problem. For soil acidity to be managed, subsurface pH also needs to be known. In the Avon River Basin study, about half ...


Survey Of Western Australian Agricultural Lime Sources, Chris Gazey, Dave Gartner Jan 2009

Survey Of Western Australian Agricultural Lime Sources, Chris Gazey, Dave Gartner

Bulletins 4000 -

As a service to WA wheatbelt farmers, to assist with cost effective management of soil acidity, a survey of agricultural lime availability and quality was conducted by the Department of Agriculture and Food, Western Australia.

The quality of agricultural lime surveyed varied widely between pits. High quality lime is available from limes and, limestone and dolomite sources. Twice as much of the lowest neutralising value lime surveyed would need to be applied compared to the highest to achieve the same increase in soil pH. Limes also varied in the distribution of particle sizes. Selecting limes with a high proportion of ...


Optlime, A Bioecenomic Model Of Soil Acidity Management In Agricultural Systems, Chris Gazey Sep 2008

Optlime, A Bioecenomic Model Of Soil Acidity Management In Agricultural Systems, Chris Gazey

All other publications

Optlime is a model that represents the essential biological, physical and economic factors related to soil acidity management in Western Australia. The model allows users to define site and soil characteristics for an acidic scenario and then simultaneously assess likely outcomes for 2 different lime sources and application strategies. With and without liming scenarios are examined over a 20 year simulation so as to capture the long-term impacts of soil acidity management. Output provided allows you to examine the likely effect of liming on pH, exchangeable aluminium, yields, and profits. An investment appraisal is provided to show you how liming ...


Wheat Variety Guide 2008 Western Australia, Christine Zaicou, Ben Curtis, Harmohinder Dhammu, Sarah Ellis, Dorthe Jorgensen, Shahajahan Miyan, Steve Penny, Brenda Shackley, Darshan Sharma Feb 2008

Wheat Variety Guide 2008 Western Australia, Christine Zaicou, Ben Curtis, Harmohinder Dhammu, Sarah Ellis, Dorthe Jorgensen, Shahajahan Miyan, Steve Penny, Brenda Shackley, Darshan Sharma

Bulletins 4000 -

This guide summarises performance characteristics of commercially available wheats and some pre-commercial lines. These lines have undergone testing in the National Variety Testing Project (NVT), Department of Agriculture and Food, Western Australia (DAFWA) wide-scale crop variety testing (CVT) and/or variety specific agronomy projects. This information includes variety summaries (Table 1), agronomic, disease and herbicide tolerance characteristics (Tables 2 to 4), medium- to long-term yield performance by wheat grade and Agzone (Tables 5 and 6). A review of regional performance in 2007 is followed by a comprehensive summary of 2007 variety time of sowing experiments (Tables 7 to 14) and ...


Tree Windbreaks In The Wheatbelt, Robert Sudmeyer, David Bicknell, Neil Coles Sep 2007

Tree Windbreaks In The Wheatbelt, Robert Sudmeyer, David Bicknell, Neil Coles

Bulletins 4000 -

Windbreaks comprising trees, or tree and shrub combinations, can offer many benefits on wheatbelt farms, particularly for protection of soil, stock, crops and pastures from damaging winds and erosion. Additional benefits include reduced evaporation from farm dams, reduced groundwater recharge, their use as nature conservation corridors and habitats, increased biodiversity including predators of crop and pasture pests, fire control, tree products and improved lifestyle and aesthetics.

In other areas and farming systems such as intensive horticulture, man-made windbreaks may be used, but their higher cost makes them unsuited for broadscale agriculture. Man-made windbreaks can be effective in reducing evaporative losses ...


Returns To R&D Investment Of Dafwa: Benefit Cost Analysis, 2005-2006, Nazrul Islam Mar 2007

Returns To R&D Investment Of Dafwa: Benefit Cost Analysis, 2005-2006, Nazrul Islam

Bulletins 4000 -

The primary outcome or objective of the projects that are assessed, is to increase the market competitiveness and profitability of agri-industry.


Field Pea In The Great Southern, Ian Pritchard, Rodger Beermier, Mark Seymour Apr 2006

Field Pea In The Great Southern, Ian Pritchard, Rodger Beermier, Mark Seymour

All other publications

Semi-leafless field pea like Kaspa have lifted the benchmark set by the previous conventional varieties such as Parafield and Dunwa. Semi-leafless field pea have the same traits as conventional field pea: adaptation to a range of soil types; wide selection of weed control options (including crop topping); nitrogen input; disease break; and reduction in root lesion nematodes. Semi-leafless pea is easier to harvest and is less prone to pod shatter.


Successful Cropping In The High Rainfall Zone Of Western Australia : Crop Research And Extension In The Zone, Narelle Hill, Heping Zhang Dr., Tim Trezise, John Young, Natahan Moyes, Laurence Carslake, Neil C. Turner Dr, Walter Anderson, Michael Poole Oct 2005

Successful Cropping In The High Rainfall Zone Of Western Australia : Crop Research And Extension In The Zone, Narelle Hill, Heping Zhang Dr., Tim Trezise, John Young, Natahan Moyes, Laurence Carslake, Neil C. Turner Dr, Walter Anderson, Michael Poole

Bulletins 4000 -

This manual is a review of all the relevant and current information relating to cropping systems in the high rainfall cropping zone (HRZ) of Western Australia. It functions partly as the final report summarising research results and extension activities and discusses recommendations and potential outcomes of two 5-year GRDC-funded projects (DAW 673 and CSP 302), that aimed to increase the productivity of southern high rainfall cropping systems.


Producing Pulses In The Northern Agricultural Region, Peter White, Martin Harries, Mark Seymour, Pam Burgess Apr 2005

Producing Pulses In The Northern Agricultural Region, Peter White, Martin Harries, Mark Seymour, Pam Burgess

Bulletins 4000 -

Pulses, like most other temperate crops, are ideally suited to environments with mild temperatures, adequate rainfall and free draining soils that have a deep uniform profile, a medium to fine texture and slightly acid to neutral pH (6.5-7.5). Pulses when grown on these soils and in these environments produce reliable yields, are relatively easy to manage and achieve good returns on investment.

Pulses can be grown very successfully in less ideal situations, but must then be managed carefully to ensure reliable yields. The different pulse species, and even different varieties of the same species, vary in how tolerant ...


Step Workshops - Guide For Facilitators, Department Of Agriculture And Food, Western Australia Jan 2005

Step Workshops - Guide For Facilitators, Department Of Agriculture And Food, Western Australia

Miscellaneous Publications

The STEP workshops can be run as independent modules or as part of the ?A Million Hectares for the Future? workshop series of which the overarching learning outcome is: Participants will be able to identify and make informed decisions to profitably manage salinity on their farms. Outlines the preferred pathway for the modules in the Million Hectares for the Future series.


Perrennial Grassess - Are They For Me? Workshop Development Guide For Facilitators, Trevor Lacey Jan 2005

Perrennial Grassess - Are They For Me? Workshop Development Guide For Facilitators, Trevor Lacey

Miscellaneous Publications

Farmers will be able to recognise landscape components on their farm that are at risk of salinity (current, imminent or future) and be aware of a range of available options available to them in managing this risk.


Subsurface Acidity, Mike Bolland, Chris Gazey, Amanda Miller, Dave Gartner, Julie-Anne Roche Feb 2004

Subsurface Acidity, Mike Bolland, Chris Gazey, Amanda Miller, Dave Gartner, Julie-Anne Roche

Bulletins 4000 -

Productive agriculture increases the concentration of hydrogen ions in soil, which acidifies the soil.

Aluminium is a component of many soil constituents, including clays and oxides, and is also present on the surfaces of soil organic matter. As the concentration of hydrogen ions in soil increases, soil pH decreases, and aluminium starts to dissolve from the soil constituents, increasing the concentration of aluminium ions in soil solution.

As the concentration of aluminium ions in the solution increases, the aluminium in the soil solution becomes increasingly toxic to plant roots, reducing root growth. The smaller amounts of plant roots explore a ...


Successful Field Pea Harvesting, Glen Riethmuller, Ian Pritchard Sep 2003

Successful Field Pea Harvesting, Glen Riethmuller, Ian Pritchard

Bulletins 4000 -

Many thousands of hectares of field peas are harvested trouble free each year. Growers experience together with recent machinery innovations and modifications have solved the majority of harvesting difficulties. Optimum harvesting conditions are in a crop of uniform density on a level soil surface with the machine either working into or across the direction that the crop has been laid by the wind.

To make harvest easier the receival standard for moisture in pulses has been lifted to 14 per cent, which allows harvest to begin sooner when the crop is the range of 14 to 15 per cent moisture ...


Organic Wheat : A Production Guide, Steven Mccoy Jan 2002

Organic Wheat : A Production Guide, Steven Mccoy

Bulletins 4000 -

Many people believe that organic agriculture systems can only work in high rainfall regions. However, some of Australia’s most successful organic farmers are the experienced organic wheatbelt growers who produce cereal, pulse and oilseed crops in different regions and soil types across the country.

Wheat is the major organic cereal crop grown in Australia - predominantly noodle and breadmaking wheats for export markets.

Farming systems developed by modern organic wheat growers can differ significantly in concept, strategies and techniques from those used by conventional growers. Successful conversion to organic requires careful planning and integration of the whole farming system over ...


Western Australia Soil Acidity Research And Development Update 2002 : Time To Lime, Department Of Agriculture And Food, Western Australia Jan 2002

Western Australia Soil Acidity Research And Development Update 2002 : Time To Lime, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

The Soil Acidity Research, Development and Extension Project has produced a summary of the activities, research results and recommendations each year and this book is the last in a series of seven.

The Department of Agriculture Western Australia, The University of Western Australia and CSIRO have supported the project with industry funds from The Grains Research and Development Corporation (GRDC) and The Natural Heritage Trust (NHT).

The high level of funding for soil acidity research, development and extension comes to an end in June 2002. It is now time for the management of soil acidity to be part of all ...


Scott Coastal Plain A Strategy For A Sustainable Future, Department Of Agriculture And Food, Western Australia Jun 2001

Scott Coastal Plain A Strategy For A Sustainable Future, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

The Scott Coastal Plain has significant attributes that make it an area of State and regional significance for agricultural production. The climate, availability of good quality groundwater for irrigation, and large lot sizes provide opportunities for mechanised horticultural production which other parts of the State may not have.

An estimate of the area that could be used for each agricultural land use has been developed, at a broad study area level. The figures presented in this report show that diversified production combining tree plantation and/or irrigation (cropping or hay/silage) with grazing enterprises provides for potential increases in gross ...


Profitable Canola Production In The Great Southern And Lakes District, Paul Carmody, Ashley Herbert Feb 2001

Profitable Canola Production In The Great Southern And Lakes District, Paul Carmody, Ashley Herbert

Bulletins 4000 -

The Canola industry has rapidly grown with a 10 fold increase in area sown in Western Australia over the four years from 1996-99.

The driving force behind this increase in area can be attributed to the successful adoption of weed control technology in Triazine Tolerant Canola.

By knowing the model of the limiting factors, which are usually; weed control, fertiliser practices, blackleg management, variety selection, seeding dates, seeding depths, insect control and swathing, we can make the right decisions and achieve the targeted profit.

To produce yield to potential, all factors need to be optimised, otherwise yields will be decreased ...


Western Australia Soil Acidity Research And Development Update 2001 : Time To Lime, Department Of Agriculture And Food, Western Australia Jan 2001

Western Australia Soil Acidity Research And Development Update 2001 : Time To Lime, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

This book for 2001 again summarises the work being carried out by staff of The Integrated Soil Acidity Research, Development and Extension projects in Western Australia. These projects are based at Agriculture Western Australia, The University of Western Australia and CSIRO.

Several articles in this book are an indication that the current round of funding for this work is drawing to a close in June 2002. The articles reflect our increasing understanding of not only the effects of soil acidity but also the time required for current practices of surface applied lime to ameliorate acidity in both the surface and ...


Dealing With A Dry Season, Department Of Agriculture And Food, Western Australia Oct 2000

Dealing With A Dry Season, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

Farmers' approaches to adverse seasonal conditions whether they be frost, flood or low rainfall should be to acquire as much information as possible on the immediate agronomic and financial situations and make a judgement on the longer term implications for the following seasons. Once the information has been acquired, in consultation with advisers, it is necessary to construct and implement agronomic and business strategies to deal with individual situations.

The agronomic and stocking options for the dry season supplied in this booklet deal with questions and issues arising from the Year 2000 season, which has been characterised by a mid ...


Pulse And Canola Frost Identification:The Back Pocket Guide, Craig White Jun 2000

Pulse And Canola Frost Identification:The Back Pocket Guide, Craig White

Bulletins 4000 -

This field guide will help you identify the common symptoms of frost damage in pulse and canola crops. It also contains pictures of other plant symptoms often confused with frost damage in these crops.

Frost damage reduces crop yield and grain quality. Early identification of symptoms allows timely crop salvage decisions to be made.

Inspect pulse and canola crops between bud formation and during pod growth if right air temperature (recorded 1.2 m above ground) falls below 2 degrees celsius and there was a frost.

Check low lying, light coloured soil types and known frost prone areas first. Then ...


Profitable Canola Production In The South Coastal Region 2000, David Eksteen Feb 2000

Profitable Canola Production In The South Coastal Region 2000, David Eksteen

Bulletins 4000 -

Why grow canola in the South Coast Region? Canola is a member of the Brassicaceae family, which also includes mustard, turnip, wild radish, cauliflower, cabbage and broccoli. It is a winter growing oilseed that can be produced in most arable areas of Australia where winter crops are currently grown. Originally known as rapeseed using the species B. campestris, the species of B. napus have almost completely replaced this earlier species in all the areas where the crop is grown.


Western Australia Soil Acidity Research And Development Update 2000 : Time To Lime, Department Of Agriculture And Food, Western Australia Jan 2000

Western Australia Soil Acidity Research And Development Update 2000 : Time To Lime, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

We have come a long way over the past three or four years in terms of both, the level of understanding and recognition of Soil Acidity as a major land degradation issue for the wheatbelt of Western Australia, and, in our actions to treat the problem.

During 1999 there were three very significant changes relating to acid soils in Western Australia.

  • Lime use in WA increased by over 200,000 tonnes from 1998 to 1999 to a record 653,000 tonnes, which was double the amount applied in 1997.
  • The Agricultural Lime Industry adopted a voluntary Lime Industry Code of ...


The Wheat Book : Principles And Practice, W K. Anderson, J R. Garlinge Jan 2000

The Wheat Book : Principles And Practice, W K. Anderson, J R. Garlinge

Bulletins 4000 -

Contents : Environment / revised by J. Cramb, J. Courtney and P. Tille - The structure and development of the cereal plant / revised by T.L. Setter and G. Carlton - Germination, vegetative and reproductive growth / revised by T.L. Setter and G. Carlton - Crop water use / D. Tennant - Nutrition / revised by M.D.A. Bolland, R.F. Brennan, J.W. Bowden, M.G. Mason, N.K. Edwards, M.M. Riley and S.W. Gartrell - Wheat in farming systems / revised by B. Bowden, P. Blackwell, P. Carmody, M. Ewing, R. Kingwell, R. L ghman, I. McFarlane, P. Michael, P. Nelson, I. Pritchard, C. Revell ...


Western Australia Soil Acidity Research And Development Update 1999 : Time To Lime, Department Of Agriculture And Food, Western Australia Jan 1999

Western Australia Soil Acidity Research And Development Update 1999 : Time To Lime, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

We all know we have to apply lime as part of our farming systems. This means that a huge amount of lime will be applied to soils which have never had lime applied before.

One of the effects of this is that we can now consider thinking about introducing acid-sensitive systems to soils, which previously would have been considered too acid.

The other side of liming is that the pH changes affect many soil properties. There is an element of uncertainty about whether unforeseen side effects will emerge on our fragile soils as a result of this new practice.

The ...


Western Australia Soil Acidity Research And Development Update 1998 : Time To Lime, Department Of Agriculture And Food, Western Australia Jan 1998

Western Australia Soil Acidity Research And Development Update 1998 : Time To Lime, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

Recent yield responses by canola where lime has been applied to acidic soils are very encouraging. Two sites have shown that the yield increase in canola after lime was applied in the previous year would have easily paid for the total cost of purchase, transport and application of the lime.

This work was carried out to demonstrate the increased options that are likely to be available once producers are treating or managing soil acidity. Canola is becoming increasingly important as a cash value crop and a break crop allowing wider rotations.

Growers are pushing the limits of canola’s tolerance ...