Our soil variability problem

You would not think our soils varied so much. At least people not involved with farming could not imagine this. One way to see the soil variation, is in roadside cuttings, though these days, they tend to cover the exposed subsoil with topsoil.
But here is good photographic proof. The wheat crop is in the eastern wheatbelt, and the variation in maturity reflects soil differences. How could you apply "precision agriculture" in this situation?