A second season of data collection and validation is now required to test whether these relationships are repeatable across different seasonal conditions and a broader range of environments. Repeating the work at similar location types, with the same varieties and nitrogen structure, would help better define environmental thresholds for efficient biomass conversion and assess the value of drone-derived imagery in supporting interpretation of yield stability and grain realisation. This validation series will leverage existing trials, including DPIRD Trials:   1. Low rainfall (Tarin Rock): 4 N r