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chaff

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Catalogue: Ground Cover
Chaff cart benefits crop and stock.. Ted Ridgway with the chaff cart he adapted with his son, Andrew, to fit their header on the family's farm at Pine Hill, South Australia... While newer herbicides, such as Sakura in wheat and Select in canola, are working well in controlling ryegrass, Ted realised he needed to diversify his control practices before he lost the new chemicals to resistance as well...
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Catalogue: Ground Cover
Chaff cart benefits crop and stock.. Ted Ridgway with the chaff cart he adapted with his son, Andrew, to fit their header on the family's farm at Pine Hill, South Australia... While newer herbicides, such as Sakura in wheat and Select in canola, are working well in controlling ryegrass, Ted realised he needed to diversify his control practices before he lost the new chemicals to resistance as well...
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Catalogue: Ground Cover
While smart chemical and crop rotation management is commonplace for grain growers across Australia trying to get on top of weeds, controlling weed seeds at harvest has also gained popularity... Western Australian grower Matthew Hill from Esperance is one of an increasing number focusing on harvest residue management, but with a difference... From there I went to Shepparton in Victoria to see Dr Graham Brodie, where we looked at microwaving and perhaps denaturing seeds directly out of the combine using microwave technology," he says...
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Catalogue: GRDC Updates (West)
" Nutrient removal - the hidden cost of chaff windrow burning Peter Newman, Department of Agriculture and Food, Geraldton carts and KEYMESSAGES The value of nutrients removed in a chaff cart when harvesting wheat in 2011 was $13/ha compared to $43/ha for windrow burning... The analysis suggests that lupin residue contains higher levels of potassium than cereal or canola; this is from a small number of samples only... The cost of a unit of potassium was estimated at the time of writing and will vary considerably...
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Catalogue: Ground Cover
Three versions of the Harrington Seed Destructor (HSD) underwent extensive tests in Western Australia during harvest 2010-11 to improve the machine's performance in crushing weed seeds... The size of the transfer duct has been reduced to make the material flow faster towards the mill, which Dr Saunders says should reduce the chance of blockages... Michael Walsh hopes to trial the HSD in Queensland, NSW, Victoria and SA during harvest 2011 to give growers outside WA an opportunity to see the device working in the paddock...
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Catalogue: Ground Cover
When assessing whether to make a change on his own farm, he uses a self-developed framework with five key factors - relative advantage, simplicity, trial-ability, observability and compatibility - to help determine the benefits and likelihood of adoption... "As a dairy, the farm needed an injection of capital and enthusiasm and I wasn't prepared to give it," Stuart says... Stuart says the biggest change since getting into grain growing has been redeveloping the flood irrigation system on the farm...
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Catalogue: GRDC Updates
In the northern agricultural region of WA in 2010 it became very apparent that the growers with low weed seed banks were able to start dry sowing early without the need to wait for a weed germination... The growers have very few livestock and are sowing the entire farm to crop... To sow a large area of crop, early, the only way to succeed is to practice integrated weed management to achieve a very low weed seed bank...
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Catalogue: Ground Cover
Persistence needed to bring down weed seeds.. Using a chaff cart at harvest has become an integral tool for tackling herbicide resistance for Tarin Rock growers Mark and Lisa Pearce... In the first year Mark tried narrow windrow burning after harvest in canola, barley and wheat stubbles, but the heat was not intense enough and a high proportion of weed seeds continued germinating in the windrow over the next four years...
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Catalogue: Ground Cover
Trials in both the western and south-eastern Australian grain-growing regions have found a 55 to 58 per cent reduction, overall, in the emergence of annual ryegrass across the three main harvest weed-seed control (HWSC) systems being practised by growers... Work by Dr Michael Walsh and Professor Stephen Powles from the Australian Herbicide Resistance Initiative (AHRI) has also found that all these HWSC systems - chaff carts, narrow windrow burning and the Harrington Seed Destructor (HSD) - have similar rates of success... The HSD, which renders seeds non-viable by collecting and impacting the chaff as it exits the harvester, can be 92 to 99 per cent effective, depending on seed species...
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Catalogue: Ground Cover
Using a chaff cart at harvest has become an integral tool for tackling herbicide resistance for Tarin Rock growers Mark and Lisa Pearce... A chaff cart that collects the seeds of these problem weeds for destroying through grazing and burning has been used by the Pearces since the 2005 harvest... In the first year Mark tried narrow windrow burning after harvest in canola, barley and wheat stubbles, but the heat was not intense enough and a high proportion of weed seeds continued germinating in the windrow over the next four years...
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