Having FOO, rainfall and stocking rate shown on a graph over time (say a year) and would allow the user to look at the trends and correlation between these variables to make educated decision on when to sell off stock/buy in. Can give you early warnings.
This suggested was from a customer who has a group of mates on Maia and mentioned they have something similar to this.
Important for times of drought and forward planning. Users want to be proactive rather than reactive.