My apples are dropping off even before the harvest season. I started from a small graft 5 years ago and my tree is about 5 ft. tall ( it is a dwarf kind). There was a lotof fruit last year but was quite dry and not tasty. THis year, we had just 2-3 fruit per tree ( I have 2). And the flesh of the apple is layered pink and whit eand it tastes dry and tart. What should I do? I am not sur eif it is getting enough water either through my sprinklers. I always see the area next to the roots dry. But the leaves look really healthy. Help before I dig my trees out...I waited too long for really bad fruit. 
<!-- s
--><img decoding="async" src="{SMILIES_PATH}/icon_cry.gif" alt="" title="Crying or Very sad" /><!-- s -->
We can't help much unless you tell us where you are located and what varieties of trees you have.
Sounds like the variety is a poor one for you. Don't pull it, graft it and you'll have another variety in bearing in much less time.
I don't know how to graft. I have two of these trees and somebody mentioned that I might have just the root stock and the graft probably failed. I live in Portland/bethany area. Need Help!
So I know time is coming again that my dry apple /rootstock tree is bearing leaves and I need someone to help me graft it. I don't know how or what to do. Please help since I don't want to take the 
tree out. I have two of them and both have the same problem. 
Saka: you can learn grafting from the internet, or by attending the grafting classes put on by the Home Orchard Society.
I'd wait for the summer (unless you can get scion wood and someone to graft it for you), and then attend the budding workshop in August. You can probably pick up some wood from the HOS arboretum, and bud new varieties onto your existing tree right after the class.