The overall rainfall amount
is critical in determining yields but, equally, higher future temperatures can contribute to reducing crop
productivity primarily due to advanced crop phenology. For example, for wheat cropping at Hamilton
(a higher rainfall site), there is a significant advancement in median flowering date for 2030, 2060, and
2090 of 10, 18, and 29 days respectively with a significant 0.50% grain yield changes for each percentage
change in rainfall compared to significant 0.90% grain yield changes in Cunderdin (a lower rainfall
site)