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Minimum tillage

Catalogue: GRDC Research Summaries
In mixed farming systems grazing of the pasture phase can be used to minimise weed burdens but for continuous croppers, or within the cropping phase of mixed farming, some tillage might be needed for integrated weed management... From an overall systems perspective, limited and strategically timed tillage could form part of a productive, sustainable system... A central question emerges : How much damage is done to soil by occasional tillage, strategically applied, in an otherwise no-till system We seek to investigate this question based on the hypothesis: That the agronomic and economic benefits of a strategic tillage operation exceed any agronomic costs due to damage to soil structure...
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Catalogue: Ground Cover
Little could the couple have realised that it would be 30 years before the trial program would finally wind up, and by then be cemented into history as one of the most remarkable sources of knowledge on Australian dryland cropping... The new concept of direct-drilling crops using a non-residual herbicide (Sprayseed ) instead of ploughing was measured against conventional cultivation... "And if we take outcomes from the Mallee Sustainable Farming project alone, we estimate that the benefits of modifying and adopting the research findings from the Avon site amount to about $500 million each year in increased grain production and reduced wind erosion," Dr Rovira said...
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Catalogue: GRDC Factsheets
western region when to sow wheat to minimise risk the optimal sowing date results in wheat flowering after the last frost and with adequate reserves of soil moisture before heat stress begins... only in seasons with a favourable spring did yields increase with later sowing... in Australia, developmental stages are commonly referred to as 'growth stages'...
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Catalogue: GRDC Factsheets
The optimal sowing time for wheat is a compromise... KeY POINts early sowing can accelerate establishment and make full use of the growing season but can increase the risk of frost during critical growth stages and hayingoff in a dry finish... in Australia, developmental stages are commonly referred to as 'growth stages'...
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Catalogue: GRDC Research Summaries
Activity 1: Estimation of the actual amount of N fixed: In Australia, most estimates of FL-N fixation were determined using indirect methods, e.g. N balance estimates or nitrogenase activity measurements using acetylene reduction assay... While the estimates provide an indication of N fixation potential, they do not provide direct estimates of N fixed... Estimation of the actual amount of N fixed quantify the amount of N fixed - Acombination of 15N isotope tracer methodology and biochemical methods are being standardized to quanity the amount of 15N fixed using soils from South Australia (Calcorosol, Alfisol, Vertisol) and Western Australia (Sodosol)...
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Catalogue: GRDC Factsheets
nortHern region Balancing the risk for wheat the optimal sowing date results in wheat flowering after the last frost but before heat stress events begin... KeY POINts early planting can accelerate establishment and make full use of the growing season but can increase the risk of frost during critical growth stages and can increase the chance of crops running out of moisture before critical reproductive stages... in Australia, developmental stages are commonly referred to as 'growth stages'...
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Catalogue: GRDC Research Summaries
The Central Queensland (CQ) region, including the Central Highlands and Dawson/Callide subregions, is home to some 400 grain growers... The CQ production environment is characterised by a summer dominant extremely variable and often marginal rainfall... In response to the complex, flexible and risky CQ production environment, grain growers have developed a highly opportunistic production system that is based on maximizing the use of rainfall...
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Catalogue: GRDC Research Summaries
" Delivering agronomic strategies for water repellent soils in WA.. Existing agronomic options are available to manage water repellent soils including furrow sowing, use of soil wetters, spreading and incorporation of clay rich subsoil and alternative land use options... 3) An extension program designed to empower growers and grower groups to identify the severity of non-wetting soils, the likely impact on grain yield, and the profitability of management strategies including an assessment of the drivers, barriers and extent of grower practice change...
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Catalogue: Ground Cover
Soil management helps absorb climate variability.. Anthony manages Wyalong Rural Investments (WRI), a 17,000-hectare corporate cropping operation encompassing three large aggregations (10 properties) that surround West Wyalong... "We had plenty of moisture in our soil at the start of the season and the forecast remained true throughout the year, with mild temperatures through winter and spring and timely rain," Anthony recollects...
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Catalogue: GRDC Media
Single tillage events can reduce moisture but may boost yields and profitability in the presence of a high weed burden... Dr Yash Dang, Queensland Department of Science, Information Technology, Innovation and the Arts (DSITIA) senior scientist (soil and nutrient management) says balancing soil moisture and weed control has been a dilemma for growers choosing to use strategic tillage to manage difficult-control-weeds within an established no-till farming system... Dr Dang said grain yields showed little response to tillage and one-time tillage using either chisel or offset disc tended to increase grain yields at all the sites but only significantly at the Condamine site...
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