lebmung wrote: >studies have bias, not always reliable<
Although this statement has some validity to it, it is still a stretch. So much of what advances science comes through studies.
Yes, indeed. Here I was referring more in context of experimenting outside the natural habitat.
For instance for mangoes, in tropical climates to induce flowering they spray k nitrate while in cold climates has no effect or even worse.
Most of the research for citrus is done where it grows naturally. Like I haven't seen any study to develop a new rootstock for containers in cold climates.