Case study: Ian Leulf – control of rye grass and black oats in a retained stubble system. Property size: 3500 ha at Weethalle, NSW. Enterprises: Dryland wheat, barley, sheep. Soil and pH: red sandy clay loam soils with a pH of 4.5. Overview: The Leulf’s generally follow a three year cropping program involving wheat, barley then fallow. After...