To build resilience into EP farms by understanding the interactions between soil potential, climate and management.

• On zones where wheat growth is not constrained the French and Schultz method gives a realistic potential yield estimate based on growing season rainfall (GSR) and a soil water evaporation term of 110 mm.
• Where soil water evaporation is higher because of sub-soil constraints and other factors that affect the growth of wheat, the soil water evaporation term must be adjusted.
• Zoning your paddocks into areas of performance and soil testing these areas separately for soil nutrients can improve decisions on where to apply nutrients for the best return.
• Fertiliser application rates at sowing should be strategic, i.e. based on the yield potential of the zone and soil test results (e.g. a sowing application of DAP or MAP on a soil with high yield potential should be supplemented with topdressing applications of N if seasonal conditions are good).