An overlaid time graph comparing the accumulated rate of water use by the plant - yield is highly correlated with the total water use.
Although F89 performed well early in the season, it's water use rate fell towards the end of the season.
The graph is generated using
@CUM(PDWU) has been entered as a keydata formula on each of the sites. The red line is
@CUM(COTTON.DWU), which is the 'ideal' line based on
long-term historical dwu for cotton in this area, but with no allowance for water logging