Farmers Weekly, Richard Allison, September 12, 2019. Ontario farmer Jake Kraayenbrink has invented his own auto-inflation system to keep tyres at the optimum pressure, lowering the risk of soil damage. It just takes him a few seconds to change the tyre pressures on his tractor and 24t twin-axle slurry tanker, ready to tread lightly across the field. High tyre pressures...