I have two crab apple trees on my property. One tree is well established in the back yard, while the other is in front of the house and I think is only 10 years old. The younger tree is a very good fruiter. This year, about 10 of the fruit from this tree are almost as large as a granny smith, while the rest are about cherry sized and bright red. Meanwhile, the tree in the back yard produces hundreds of small fruit, but they are about 2/3 the size of a cherry and more pinkish than red. I do not know how old this tree is. If I could get larger apples off of the other tree, I would have more than enough for cidering, etc. As it is, I have enough fruit for a few jars of jelly, but not much more. I believe the tree in front of the house was planted as an ornamental, and has been fertilized, etc. I do not think it has been grafted. This tree is about 10 feet from the road, so I am concerned about polution, etc. It is too large to transplant myself, otherwise I would move it around back. So, I have two questions. First of all, do I have two different varieties of crab apple? Second, if both are the same variety, how do I improve the yield of the larger tree?