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Catalogue: GRDC Updates (West)
Mention of a trade name or company in this publication does not imply endorsement of any product or company by the Department of Agriculture and Food, Western Australia... Overall, the DAFWA indices suggest that a more optimistic approach to decision-making is recommended in 2006 and confidence in this assessment would be enhanced if a La Ni a develops... The needs analysis has enabled an assessment of the distribution of farmers along the pathway from initial awareness through to final adoption of CRM information and tools being offered by various organisations...
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Catalogue: Ground Cover
Craig Thompson bought a WEEDit precision sprayer seven years ago and says it has become a crucial tool for summer weed control... A stark drop in growing-season rainfall in WA's northern wheatbelt means growers have to get crop roots much deeper into the soil profile to access moisture.. Craig says that wheat-on-wheat, with the aid of Clearfield wheats, has simplified the system and allowed him to concentrate on the single most important element - holding on to every drop of rain that falls...
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Catalogue: GRDC Media
There are few positives to come out of back-to-back dry seasons - such as that experienced by South Australia's south east - but growers can use the experience to dig deep below the soil surface to understand what is contributing to crops not fulfilling their yield potential... Dr Melissa Fraser, a soil consultant with the Rural Solutions SA division of Primary Industries and Regions SA (PIRSA), says a lot of soils in south east SA have a physical or chemical impediment that restricts root growth to the top 10cm of the soil, hindering the plants ability to access moisture and nutrients stored deeper in the profile... Dr Fraser is encouraging growers in the south east to dig holes over summer and do some deep soil testing to get a basic understanding of the make-up of the subsoil and to understand what might be holding back yield potential...
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Catalogue: GRDC Media
There are few positives to come out of back-to-back dry seasons - such as that experienced by South Australia's south east - but growers can use the experience to dig deep below the soil surface to understand what is contributing to crops not fulfilling their yield potential... Dr Melissa Fraser, a soil consultant with the Rural Solutions SA division of Primary Industries and Regions SA (PIRSA), says a lot of soils in south east SA have a physical or chemical impediment that restricts root growth to the top 10cm of the soil, hindering the plants ability to access moisture and nutrients stored deeper in the profile... Dr Fraser is encouraging growers in the south east to dig holes over summer and do some deep soil testing to get a basic understanding of the make-up of the subsoil and to understand what might be holding back yield potential...
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Catalogue: Ground Cover
On Kit Leake's property at Kellerberrin, WA, CSIRO Sustainable Ecosystems scientist Dr Yvette Oliver is working with the Kellerberrin Demonstration Group - part of the Grower Group Alliance - to show how yield variability across a paddock relates to plant-available water capacity... Dr Oliver, whose work is part of the GRDC's Nutrient Management Initiative, says the low-yielding site was a deep-yellow clay-sand with an acid layer at 200 millimetres and aluminium and pH toxicity and root constraints at 500mm, which combined to constrain plant-available water capacity to about 30mm... [Photo (left) by CSIRO: Kellerberrin Demonstration Group member Kit Leake explains soil constraints with Department of Agriculture and Food, WA, nutrient expert Bill Bowden (in pit), KDG chairman Scott Dixon, CSIRO's Yvette Oliver and Wallatin-Wildlife's Jessica Forsyth.] In the high-yielding site a hard pan was visible at 200mm and an acid layer was starting to develop, which would require deep-ripping and liming...
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Catalogue: GRDC Factsheets
Deep ripping not appropriate for all soil types A comprehensive understanding of the cause and location of high soil strength is required before undertaking deep ripping as research has shown it is does not provide an economic solution in some soil types... KEY POINTS Deep ripping of compacted soils is most likely to improve grain yields on sandy soils and where compaction has occurred on upper parts of the soil profile through machinery traffic or livestock trampling... Overall, compacted subsoils impede root growth, causing reduced plant vigour and poorer water-use efficiency as roots have limited access to water and nutrients, especially in the subsoil...
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Catalogue: GRDC Media
To help address the challenge, the Grains Research and Development Corporation's (GRDC) Esperance port zone Regional Cropping Solutions Network (RCSN) group has identified key issues and questions about soil fertility and soil health that impact specifically on growers on the south coast of WA... The group developed the Soils Masterclass workshop sessions for growers and other industry players to have an opportunity to ask these questions of top researchers working in the field, many of whom are based in WA... "Giving growers the confidence to predict the severity and extent of these problems and assessing the tactics to help address them is important in a climate of tight margins driven by changing weather patterns and costs versus returns," she said...
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Catalogue: GRDC Media
Get the dirt on soils at Masterclass.. The one-off event is being organised by the Grains Research and Development Corporation (GRDC) Esperance Regional Cropping Solutions Network (RCSN), the South East Premium Wheat Growers Association (SEPWA) and the Department of Agriculture and Food (DAFWA)... James Hagan (DAFWA) and Andrew Newall (NEWAG Consulting): Matching equipment for controlled traffic farming (CTF) systems; economics of CTF - constraints and rooting depth, machinery planning, transition planning of machinery..
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Catalogue: GRDC Media
Scaddan workshop to delve into soil constraints.. The group developed the Soils Masterclass workshop sessions for growers and other industry players to have an opportunity to ask these questions of top researchers working in the field, many of whom are based in WA... "Giving growers the confidence to predict the severity and extent of these problems and assessing the tactics to help address them is important in a climate of tight margins driven by changing weather patterns and costs versus returns," she said...
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Catalogue: Ground Cover
Western Australian grower Brad Jones examines the subsoil constraints to crop productivity exposed by soil pits on his property, about 184 kilometres east of Perth... Growers are increasingly complementing the expertise of agronomists with that of soil consultants to better understand how their soils function at depth.. "I plan to do this for the rest of my life, so I need to understand the soils that support our grains operation and start replacing the range of nutrients that decades of cropping have taken out," Leeton says...
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