Apple Trees

Help! I have 3 apple trees of varying ages, 1 year. 3 years and 8 years old. This year the youngest one had lots of blossom on, the middle on a bit, the older one none at all. I only got one apple from the trees on the year old one! I have only once had about 6 apples on the 8 year old tree. What am I doing wrong? I prune them in November and then let nature get on with it. I see so many apple trees on roadsides that a laden with apples, why aren't mine. I would be grateful of any advise anyone can give. My dream is to have a nice little orchard in my garden!

 

I'm no fruit expert, but I'd be tempted to suggest it's possibly how you're pruning.

 

What varieties are you growing? Also how are you doing your pruning?
Just had a further thought......
What type of tree are they. Are they bush or one of the restricted forms such as cordon or espalier?