Question
You kindly answered a question about 1 week ago re some nonbearing  trees and suggested I apply, as I recall 4.75 lbs of fertilizer to each tree.  Upon reflection, that seems like a lot of fertilizer per tree.  Did I read your reply correctly?

Answer
The amount was 7.5 lbs for a 15 year old tree. Yes that is correct. Scatter it under the drip line of the tree and water in. I would wait until there a high prediction for rain and do it then this will save having to water.   


" More than likely it needs fertilizing and pruning.
Apple trees should be fertilized each year in the spring. For optimum tree growth and fruit quality, conduct a soil test every two to three years to determine the appropriate fertilizer and application rates. The rate for a 15 year old tree is 7.5 lbs of 10-6-4 fertilizer. Apply the recommended fertilizer as a broadcast over the area under the tree drip line.

here is a web link to the proper method of pruning a mature apple tree. They should be pruned each year.
http://ohioline.osu.edu/hyg-fact/1000/1150.html"