I have inherited my parents' Georgia property and their four huge pecan trees that were planted in the 1950s. Though they appear healthy, nothing has been "done" to them in more than 25 years, and if they are producing at all, it isn't much. I'd like to try for a crop - any suggestions beyond fertilization?
60+ Year Old Pecan Trees
Certified GKH Gardening Expert
Pecan Trees do need regular fertilizing.
Lack of lime, nitrogen fertilizer and zinc are common limiting factors in nut production.
A soil test is a good idea since you are starting with little knowledge of the tree care.
Generally you would apply fertilizer in March on mature trees.
Here are some links to help you.