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| Issue2, June 2005 | information about Land, Water & Wool |
Wool environmental credentials recognised
The McKell medal recognises an outstanding contribution to people who demonstrate commitment to improving land and water management through on-farm action, scientific research or community involvement. Land & Water Australia Executive Director Andrew Campbell said that for over 20 years, Tom and Cynthia have been an inspirational and practical example of how business profitability and sound environmental practices can go hand-in-hand. “Because their business is heavily dependent on native grasslands and woodlands for grazing capacity, the Dunbabins have always shown leadership in improving our understanding of the local and regional ecology,” he said. Australian Wool Innovation Limited Chief Executive Officer Dr Len Stephens added that such a passion to learn more about their landscape, and the wider environmental issues affecting the wool industry, had resulted in the Dunbabins making a significant contribution to wool industry research and development. “Woolgrowers such as Tom and Cynthia understand that to ensure our wool industry remains healthy, the resource base on which it relies must be managed in a sustainable manner. It is clear from their actions, and now this significant award, that balancing production with good environmental outcomes results in profitability, productivity and sustainability gains,” Dr Stephens said. Tom, Cynthia and their son Matt are fourth and fifth generation woolgrowers on their family’s historic, 6000-hectare property ‘Bangor’ near Dunalley in Tasmania’s south-east. They also run Merino wethers on a 2000ha property ‘The Quoin’ near Ross in the Midlands. CONTACT: Mike Wagg, Land, Water & Wool Program Manager, mike.wagg@lwa.gov.au |
The Land, Water & Wool program is recognition that as one of the countries largest land-use enterprises, the wool industry has a unique role in the management of land and water resources. Australia’s 40,000 sheep and wool producers currently manage nearly 100 million sheep across 85 million hectares of the landscape. Across this vast area, the industry faces many environmental challenges- including dryland salinity, water quality and managing native vegetation – all within a variable climate and the desire to balance production with good environmental outcomes. The recently-released Land, Water & Wool Project Guide is a handy and concise reference to all the projects within the program portfolio that gives a brief project overview and contact details for further information, available as a booklet or via the program website (see below). Since the last newsletter I have visited Land, Water & Wool projects in Western Australia, Queensland and Victoria. Many of the research projects are starting to yield results. For example, SGSL sites in WA are showing significant opportunities for increased production through grazing management and supplementation of saltbush, while work in Victoria is showing how both groundcover and productivity can be increased in hill country through better grazing management. As clear management recommendations start to emerge from the research the challenge will be to understand how they can be integrated into individual farm businesses in a way that enhances the triple bottom line. CONTACT: Mike Wagg, Program Manager, Land, Water & Wool, mike.wagg@lwa.gov.au |
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The loaded gully – why better management options are needed |
New research from Land, Water & Wool is showing that a 50-millimetre rainfall event can send 75 tonnes of suspended sediment, 15 megalitres of discharge (water flow), 20 kilograms of phosphorous and 75 kg of nitrogen through a single farm gully within hours. Run-off, water quality and turbidity data has been captured by Rivers and Water Quality sub-program researchers using sophisticated technical equipment installed on a typical gully in the region, located on the NSW Southern Tablelands property 'Bogolara'. The data is being used by local woolgrowers and researchers to learn about the impact of gullies on water quality downstream, and to develop better management options applicable to the hundreds of similar gullies throughout the Tablelands regions. Results to date tell an interesting story (see graph below). |
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The red line on the graph shows discharge through the gully during the flow event. It was quite a short event, starting at 4.30pm, peaking at around 8.00pm and then tailing off around midnight. What is interesting is the green line that shows the concentration of sediment, or the turbidity measurements, peaked before the peak of the flood. This is because when an event starts it immediately washes all of the unstable surface off the gully downstream, and this happens very quickly. Researchers have found that the amount of sediment being released through the gully (that is, the total load rather than the concentration shown in the diagram) does not match the shape of the flow curve, but tends to remain at quite a high constant level. The dominant erosion process at work in the gully during the flow event is scour, and this can continue to loosen and carry away fresh soil from the unprotected gully sides as long as the flow continues. This helps to explain why these gullies continue to expand in the landscape, unless they are stabilised, until their lowered surface reaches a new equilibrium. The next stage of the research project will be to trial three alternate land management strategies, ranging from minimal involvement to major intervention, to identify practical ways of addressing the problem and stabilising and rehabilitating the gully. CONTACT: Dr Siwan Lovett, Rivers and Water Quality sub-program manager, siwan.lovett@lwa.gov.au |
A quartet of biodiversity and profit options |
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Research from nine case study wool properties in the hill country of central Victoria has identified four different management strategies for improving the condition of native vegetation and wool profits. These strategies, identified by the Native Vegetation and Biodiversity sub-program, are referred to as ‘Correcting nutrient deficiencies’, ‘Deferred grazing on hill country’, ‘Intensive rotational grazing’ and ‘Establishing shelter belts’, with the names reflecting the broad management actions. The suitability of management strategies depended on the amount of hill country and current stocking rates on the property. The ‘Deferred grazing’ and ‘Intensive rotational grazing’ strategies were found to have the most favourable impact on the condition of native vegetation, and were most likely to result in extra profits regardless of current stocking rates. Both these strategies require initial investment in fencing and watering points estimated at $30 per hectare. Using ‘Deferred grazing’ on hill country areas generated the most attractive returns, of up to an extra $27/ha/year. Applying the ‘Correcting nutrient deficiencies’ strategy across the properties' most productive paddocks has the potential to more than offset the costs of managing 15 per cent of a property for native vegetation and biodiversity. However if stocking rates were above 10 DSE/ha, using this strategy would generally not improve the stocking rate enough to offset native vegetation management costs. Woolgrowers running low stocking rates (<8 DSE/ha) had the most potential to increase wool profits by correcting soil nutrient deficiencies. This strategy assumes fertiliser is not applied to areas being managed for native vegetation and biodiversity. If 30 per cent of the farm area is to be set aside for managing native vegetation and biodiversity alone, neither the ‘Correcting nutrient deficiencies’ or ‘Intensive rotational grazing’ strategies will generate enough extra profit to offset lost grazing area income. Establishing shelter belts by encouraging natural regeneration can deliver benefits to sheep performance and pasture growth by an extra $10 /ha/year after 15 years or when trees are fully established. However if 15-30 per cent of farm area is established to tree shelter, the initial cost of fencing and lost grazing area for the first five years is not offset for a minimum of 15 years. For instance, if 12 per cent of the grazing area was established to shelter, the benefits just begin to outweigh the costs after 15 years. These results suggest that incentive payments may be required in regions with high revegetation targets. CONTACT: Professor Jann Williams, Native Vegetation and Biodiversity sub-program coordinator, jann.willams@lwa.gov.au |
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Don’t separate the wool from the treesEnvironmental protection and profitable grazing systems are entirely compatible and need to be core business goals for all Australian woolgrowers. That’s the viewpoint of Land, Water & Wool Sustainable Wool Advisory Group chair Tom Dunbabin, who spoke to more than 200 delegates at the Australian Wool Innovation Limited Woolgrower Forum in Hobart as part of the IWTO Congress in late April.“As one of the country’s largest land-use enterprises and adapted to a wide spectrum of environmental conditions, our wool industry has a unique role in the management of our land and water resources,” he said.Mr Dunbabin argued that well-managed natural resources are the key to profitable and sustainable grazing systems, resulting in a win:win outcome for woolgrowers and the environment. To view Mr Dunbabin’s full media statement, visit www.landwaterwool.gov.au Land, Water & Wool Project Guide |
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Feedback?Get in touch with the Land, Water & Wool Communication Team with any feedback, events, activities or interesting research outcomes that you want to share with the Land, Water & Wool program team. CONTACT: Kim Mitchell, kim@curriecom.com.au or Fleur Flanery fleur.flanery@lwa.gov.au |
Disclaimer The information in this newsletter is intended for general use and has been published in good faith by Land & Water Australia on behalf of the Land, Water & Wool Program to assist public knowledge and discussion and to help improve the sustainable management of land, water and vegetation. The information should not be relied upon for the purpose of a particular matter. Specialist technical and legal advice should be obtained before any action or decision is taken on the basis of any material in this document. The Commonwealth of Australia, Land & Water Australia, Australian Wool Innovation Ltd, the authors and the Land, Water Wool Program and its partners do not assume liability of any kind whatsoever resulting from any person’s use or reliance upon the content of this document. |