Transparent variety apple tree advice please
I have a mature (probably 30 year old) apple tree in the back yard. The apples appear to be Transparent variety or similar -- very early ripening.
I want to bring the tree down to a manageable height, as it's currently too tall to harvest without lopping off branches. I HAVE lopped off a lot of the recent vertical growth leaving the tree about 20 feet high. I would also like to try and rejuvenate the tree, as it's become less productive over the last 7 years since we've owned the house.
My question is: how much further can I safely bring it down without harming the tree? And should I get a professional to do it?