What's more productive - root of leaves

[mobiledynamics]

Let's say for arguments say, when you transplant, you have a 10 inch exposed stem tall plant. With 5-7 inches of root mass.

Would you split the difference and just leave 5 inches of growth above the soil line and bury the rest in.

Or leave the 10 inches alone so it can catch the sun

I'm doing something different this year - to some degree. My goal is to continue upsizing - I think I got 1 more pot upsize before the final pot - I'm going to put them in 1 Gallon RootPots until final transplant. I might even keep them in rootpouches for a bit before they go into dirt/larger pots as the roots love the air exchange they get when in root pouches.

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To expound on this topic deeper, buring deeper. Is there a indifference whether one does it in dirt or pot (in my case, pot is fast draining airy mix of perlite/composted bark).