1. Explode concentrations to balances of concentrations
  2. Identify a healthy state
  3. Fit a model the identify the healthy hypervolume
  4. Run the model to predict the yield class of a new ionome
  5. If unhealthy, identify the targeted concentrations
  6. Express the needed perturbation as a concentration ratio
Note that a perturbation indicates the change needed, not how to achieve this change. Fertilizer trials become handy but nearest neighbors are helpful because corrective measures have been already applied successfully there. It should be noted that the closest healthy point might not be the easiest to reach, and professional agronomist must adapt results to local conditions and may select a solution not appearing at the closest point. For example, if the concentration of aluminium is too high, this could be corrected by increasing soil pH. But if increasing pH is not a viable solution, the agronomist could look for a high yield zone in a fractal hyper-volume where Al is still high but less damageable due to other interactions.