Farming Deep In Climate Change: The West Australia Experience
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Transcript of Farming Deep In Climate Change: The West Australia Experience
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Climate change in the Northern Agriculture Region of WA
- threats and opportunities
Tim Wiley,Department of Agriculture and Food Western Australia
Geraldton
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Yearly Rainfall Lynton, Northampton shire, WA
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Plant available rainfallLynton, Northampton shire, WA
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“High stocking rate grazing systems to reduce erosion”Northern Agri Group with NLP, NACC & DAFWA
• Farmers recorded stock movements 06/07
• DAFWA calculated grazing days for each paddock
• DAFWA measured ground cover in May 2007
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Sand storm 9 April 2007
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Annual pasture on sand
30 May 2007
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Crop stubble at Murray Carson’s
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Perennial grass pasture& tagasaste
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y = -10.184x + 66.494
R2 = 0.597
y = -6.4896x + 24.265
R2 = 0.3309
y = -24.92x + 48.578
R2 = 0.5653
y = -7.0001x + 79.94
R2 = 0.8724
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Dry Sheep Equivalents / Ha
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cove
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Annuals on gravel
Annuals on sand
Tagasaste
Perennials
Wheat stuble
Sown fodder
Lupin stubble
Linear (Perennials)
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Jim Wedge’s ASCAS, October 2008Soil Corer
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Bulk Density sampling
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Carson May 2008
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Bain February 2008
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Gillam Q&Q March 2007
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‘Whole soil’ Organic C in the top 30 cm of soil - annuals vs. perennialsPaired paddock sampling
Paddocks Pasture OC% Bulk Density C t/ha CO2e t/ha/yr
Nixon Annual 0.41 1.60 19.7
Perennial 0.66 1.60 31.5 10.8
Wilson Annual 0.80 1.57 37.7
Perennial 0.94 1.57 44.3 6.0
Forsyth Annual 0.32 1.61 15.5
Perennial 0.45 1.61 21.6 3.7
Bain Annual 0.59 1.60 28.1
Perennial 0.83 1.60 40.0 11.6
Bain Annual 0.63 1.60 30.4
Perennial 0.60 1.60 28.7 -1.6
Carson Annual 0.56 1.38 23.2
Perennial 0.69 1.37 28.2 3.9
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‘Whole soil’ Organic C in the top 30 cm of soil - annuals vs. perennialsTrial site Pasture Organic C % Bulk Density C t/ha CO2e t/ha/yr
Combes A Annual 0.53 1.38 22.0
Green panic 0.64 1.38 26.5 6.1
Rhodes 0.64 1.38 26.6 6.1
Kikuyu 0.70 1.38 29.0 9.4
Lotononis 0.82 1.38 33.9 16.0
Combes B Annual 0.47 1.48 20.9
Rhodes 0.58 1.47 25.6 6.3
Lucerne 0.56 1.47 24.7 5.1
Gillam Annual 0.47 1.28 17.9
Rhodes 0.48 1.43 20.6 2.7
Green panic 0.52 1.43 22.3 4.4
Signal grass 0.52 1.43 22.5 4.5
Metcalfe Annual 0.79 1.47 34.7
Rhodes 0.93 1.47 40.8 8.1
Kikuyu 0.84 1.47 37.0 3.1
Lucerne 0.96 1.47 42.1 9.9
Siratro 0.91 1.47 40.1 7.2
Bambatsi panic 0.91 1.47 40.1 7.2
Green panic 0.77 1.47 34.0 -1.0
Couch 0.83 1.47 36.4 2.2
BRS Annual 0.44 1.42 21.0
Kikuyu 0.75 1.37 36.2 11.7
Rhodes 0.59 1.37 28.2 5.6