Theme Lead: Prof. James Hunt, University of Melbourne

Fast Graphs for “Slow Thinking”

Supporting a more deliberate and logical approach to decision making

Field trials compare risk and rewards for nitrogen decision approaches

A network of 43 small plot and paddock scale trials are quantifying the risks and rewards of different nitrogen management decisions over multiple years. These trials will characterise the yearly variability in response to N but importantly also measure carryover of residual N from one year to the next.

Nitrogen Decision Making Approaches

Applying fertiliser is considered a ‘risky’ decision because of uncertainties associated with a lack of return on investment in the year of application, negative yield responses to applied N or losses of N. A range of different approaches can be applied to balance these risks and rewards.