Using CA to improve water use efficiency in wheat crops on the Branson farm in SA. Mark Branson
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A presentation at the WCCA 2011 event in Brisbane.
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Using CA to improve water use efficiency in wheat crops on the Branson farm in SA. Mark Branson
- 1. Using Conservation Agriculture to improve water use efficiency in wheat crops on the Branson farm in South Australia. Mark Branson (B.AppSc (Agric), 2005 Nuffield Scholar,)
- 2. The Branson’s Family Farm Area: 1200ha Stockport Lower North of South Australia Rainfall: 425mm to 525mm Dryland Farming System
- 3. Stockport
- 4. Crops Grown (80%) - Durum and Bread Wheat - Malting Barley - Canola - Faba Beans - Field Peas - Pasture Seeds
- 5. Clover and Duel Sheep –(20%) Purpose Cereal Pastures Self Replacing Merino Flock And a Prime Lamb Flock
- 6. Water Use Efficiency (WUE) over 23 years in wheat 4.50 100.00 5 Year Average Yield (T/Ha) 5 Year Average % Potential 95.00 4.00 90.00 85.00 3.50 80.00 Yield (T/Ha) Yield 75.00 % Potential Yield Linear (% Potential Yield) 3.00 70.00 65.00 2.50 60.00 55.00 2.00 50.00 1988-93 1990-94 1991-95 1992-96 1993-97 1994-98 1995-99 1996-00 1997-01 1998-02 1999-03 2000-04 2001-05 2002-06 2003-07 2004-08 2005-09 2006-10 5 Year Period
- 7. French/Schultz Potential Yield Model for Wheat Potential Yield = (GSR-110)*20 ie. If GSR = 350mm Potential Yield = (350-110)*20 = 4800kg/ha
- 8. French/Schultz Potential Yield Model for Wheat Potential Yield = (GSR-110)*20 Potential Yield = (350-110)*20 = 4800kg/ha If actual yield was 4000kg/ha Then % potential yield = 4000/4800 = 83% Ie the Water Use Efficiency is 83%
- 9. WUE over 23 years 4.50 100.00 5 Year Average Yield (T/Ha) 5 Year Average % Potential 95.00 4.00 90.00 85.00 3.50 80.00 Yield (T/Ha) Yield 75.00 % Potential Yield Linear (% Potential Yield) 3.00 70.00 65.00 2.50 60.00 55.00 2.00 50.00 1988-93 1990-94 1991-95 1992-96 1993-97 1994-98 1995-99 1996-00 1997-01 1998-02 1999-03 2000-04 2001-05 2002-06 2003-07 2004-08 2005-09 2006-10 5 Year Period
- 10. WUE from 1988 to 2005 4.50 100.00 5 Year Average Yield (T/ha) 5 Year Average % Potential 4.00 90.00 Yield (%) 3.50 80.00 Yield (T/Ha) % Potential Yield Linear (% Potential Yield) 3.00 70.00 2.50 60.00 WUE annual increase of 1.1% 2.00 50.00 1988-93 1990-94 1991-95 1992-96 1993-97 1994-98 1995-99 1996-00 1997-01 1998-02 1999-03 2000-04 2001-05 5 Year Periods
- 11. Years from 1988 to 2001 Farming system changes • Introduction of Grain Legumes and Oilseed crops. • Introduced new wheat varieties. • Nitrogen based fertilizers introduced. • Stubble retention enforced. • No-Till introduced.
- 12. WUE from 2002 to 2010 4.00 100.00 5 Year % Potential Yield (%) 5 Year Average Yield (T/Ha) 90.00 Yield (T/Ha) 80.00 % Potential Yield 3.50 Linear (% Potential Yield) 70.00 60.00 WUE annual increase 2% 3.00 50.00 2002-06 2003-07 2004-08 2005-09 2006-10 5 Year Period
- 13. Years from 2002 to 2010 Farming system changes • No-Till enforced • Precision Agriculture introduced • Controlled Traffic introduced • Introduction of using animal manures as an additional carbon source • Growing as many high carbon crops as possible • Inter – Row sowing introduced.
- 14. WUE from 2002 to 2010 4.00 100.00 5 Year % Potential Yield (%) 5 Year Average Yield (T/Ha) 90.00 Yield (T/Ha) 80.00 % Potential Yield 3.50 Linear (% Potential Yield) 70.00 60.00 WUE annual increase 2% 3.00 50.00 2002-06 2003-07 2004-08 2005-09 2006-10 5 Year Period
- 15. My Farming System in 2011
- 16. No-Till
- 17. Sowing Equipment -JD 8200 Tractor (200hp) -CASE PTX – 600 32’Barr, 9” Alternate spacing -Horwood Bagshaw 3*2000L quad box, electric drives -Auto CutOff.
- 19. Sowing equipment 1/4 width of Sprayer 9.8m sowing equipment 2.2M Spacing 39.2m Sprayer
- 20. Compaction • When using • Most of the random compaction traffic in a damage is done field, at least in the first pass. 50 % of the field is driven over.
- 21. Precision Agriculture Mainly VR Nutrients, Seed, and Weed Management.
- 22. Autosteer - RTK 2cm Guidance
- 23. Inner Row Sowing
- 24. Spray Equipment -Millar Nitro 3275 -4wd, High Clearance -39 M Boom -RTK 2cm Autosteer and Autosection Cutoff -Ideal for Controlled Traffic
- 25. Header -Case 7120 -30ft Honey Bee Draper Front -Chopper -15T Chaser Bin -AFS Yield Monitor
- 26. Yield Monitor
- 27. Durum Wheat • Last year Faba Beans • No Nitrogen applied till flag leaf emergence, mainly for protein. • Deep N test at sowing of 0-60 165N/Ha
- 28. Durum Wheat
- 29. Thanks