AJUST-A-BAR tills the soil, to an adjustable depth or 'aggression'. Most broadacre tillage implements have a fixed depth of cut. Ajustabar can lightly cut stubble or aggressively cut weeds by adjusting the angle of the support arms. The folding mechanism also makes it easy to tow through gates and on roads.
Martin Contracting Pty Ltd in Bungowannah, New South Wales developed the Ajust-a-bar implement. Sarah Boyd modelled the mechanism and created production parts drawings using BricsCAD Platinum. See http://ajustabar.com.au/