>>2733981Do graft buds/scions from the the old trees on a good rootstock like the
>>2734035 anon says. Or at least graft those that stopped producing and those that bear nice fruits. It's almost the right season to start bud grafting.
Look up a pest and disease recognition guide – often local governments / public institutions at least list diseases and pests present in the region. Inspect if your trees are bothered by any.
It's highly possible that some bacteria / fungi fuck parts of the trees, and correct countermeasures must be enforced to stop them / get rid of them, and importantly, stop them from spreading. If unsure, post pics.
Severing large branches from the trees (but remember to seal the wounds correctly!) usually induces new growth. Many trees fruit on young (2-4 year old) twigs/branches, so reducing an old tree may counter-intuitively increase fruit yield. You may use this to remove top branches of the tree. But cut no more than a third of the tree, or the roots will not be getting enough nutrients to flourish.
In the past may trees were purposefully allowed to grow tall and the fruits were collected from a ladder.
The current fashion says that you should keep the trees low - you may plant trees closer to each other, there are more trees so you get high fruit yield in less years, so it takes less time for the farmers to replace the varieties to those that gain popularity. Buzzwords "flexibility" and "adaptiveness for market trends" apply.
Enjoy the irrelevant tree monster pic.
