Ins and Outs of Lime Incorporation in the West Midlands Stephen Davies, Chris Gazey, Anne Wilkins, Dave Gartner Precision SoilTech
Bindi Bindi, Barley response t/ha1.78 t/ha Nil lime t/ha 2005 injected 2 t/ha lime t/ha Data: C. Gazey; AgLime; Precision SoilTech
Incorporation or more Lime?
Esperance Downs Research Station – Repellent Duplex D. Hall, DAFWA
2013 Badgingarra sandy gravel
Badgingarra sandy gravel Topsoil pH less than 5.0 Subsoil pH = 4.8 or higher
Wheat grain yield 2013 season Also: Grain yield MBP 11% Grain yield MBP + Lime 18% Grain protein 1-1.5% higher Screenings % lower Kernel weight 1-3 mg heavier Treatments applied once only in 2007
Barley grain yield 2014 season Whole site deep ripped 2014 Grain yield response: MBP or Lime 12% MBP & Lime 38% Paddock average 3.1 t/ha
Subsoil target Topsoil target Limed once in t/ha limesand Knife point seeder 7-inch row spacing, working 6- inches deep Soil pH 2014
Ryegrass biomass 2014 Ryegrass biomass change: Surface Lime 54% Mouldboard plough 36% MBP + Lime 75%
Openers on ripper tines Incorporation depth = cm
Wings on ripper tines Incorporation depth = cm
Grizzly deep digger Incorporation depth = cm
Grizzly offsets vs Spader OFFSETS Depth = cm SPADER Depth = cm
Modified blade plough Incorporation Depth = cm Incorporation depth of other options Regular deep ripping, standard offsets = cm
Supporting your success Modified One-way plough Untreated = 6.6 OWP = 3.3 MED
1)Know your pH profile to depth 2)Have a strategy top apply enough lime to fix & maintain the pH profile 3)Assess whether the soil will be responsive to cultivation 4)Other constraints - water repellence, compaction, weeds? 5)Undecided about incorporation method? – keep liming! 6)Variable rate apply lime to major soil types if warranted Incorporation or More Lime? Fix the top… Line things up… Fix the bottom
GRDC Projects DAW00204 & 244 Soil water repellence DAW00236 Soil acidity COGGO Project: Developing and testing innovative, practical and reliable methods for incorporating lime into acidic sandplain subsoils – West Midlands Group NACC Projects: Demonstrating innovative practices for the amelioration of sub surface Acidity to improve soil health; Thanks to: Peter Negus; David Paish, Glen Riethmuller, Travis Hollins Precision SoilTech