Replacing mature trees
I have two very large fuji apple trees which my father planted in the mid 80s. He didn't prune them much at all, and by the time he died they were both reaching twenty or so feet high in the middle. I gave them major haircuts for a couple of years just to bring them under control, and then minor pruning after that to shape them up.
They are good producers, so I could easily get by with one. I am wondering when I should think about replacing one of them so that at some point I'm not faced with losing both at the same time. I have a lot of land, but I also have many other fruit trees,and I don't want to dedicate more space to fujis.