Personally i cut top /bottom /wedges - total about 1/3 along with trimming canopy and its done every 2-3 years .

Only what i been doing over the years not a rule of thumb.

Martin

Here is example from my above post with picture of almost finished root pruning.
Three wedges were made along with top and bottom rootball cuts made with several inches off each, one can see were old mark was at on trunk above soil line.
Used was a recipricating saw with 9 inch pruning blade, finally finish cuts were made top to bottom straight down on outside of those wedges, those cuts not shown as they were not made yet when picture was taken.

dieseler, please try again, I can't see any photos here, thanks

Radovan i used the HTML code as always here on GW the photo shows it may be something with your computer.
Good luck and hope you can see them by trying again.
Martin

Thanks dieseler, i guess it's me

Thanks Martin, that is very explanatory and helpful picture and description.
(my 9" reciprocating saw blade got stuck in 8" thick branch while cutting storm broken branch of Russian olive tree. I left it in the branch and will recover it whever it is not cold and rainy)

Also, I am glad to see Radovan posting.

I have good memories of you both. Stay well.

Martin,
When you prune the roots that much, is productivity decreased that next summer, or does the tree keep producing like always?

Eboone (good question) when roots are pruned the canopy is also trimmed
so they stay in balance with each other so yes less production.

Some or many figs will drop if root system cannot support the topside growing in container.

Martin