All I see is a pleasant discussion.
I'm curious and skeptical by nature.
This "fertilization" topic interests me for many reasons. I find a similarity between it and the notion that Maurice Thompson was wounded during the Civil War.
It's been passed on in article after article that fertilization increases mast production and that Maurice Thompson was wounded.
It took a number of years to uncover the source for the wounding of Maurice Thompson but I finally worked it out.
I'm still researching the source for fertilizer/mast production. The process is like working a blood trail. You stay on it to you find the critter.
I grow Satsuma oranges, Japanese persimmon and southern crabapple in our back yard...for at least 10 years. Every year the fruit or mast production is different. Sometimes you have an outside influence that can be identified, such as squirrels toting off the green persimmons in August. That was easily solved.
The persimmons enjoyed a bumper crop last year and our resident mockingbirds worried over their persimmon stash well into this year.
Most years, my southern crabapples [two trees from seed I carried back from Columbia county, Georgia] have a pretty good mast crop but normally drop all by end of October. This year they had a better than normal crop and held fruit on the trees until the 3rd of December.
This year our Satsumas set a large quantity of fruit but when the drop finished we had only 24 left, versus over 50 for the large tree the past year. But, these 24 oranges obtained the size of grapefruit.
Now, all three fruit/mast species had a significant change in production from the previous year. I was sure in identifying one variable [the squirrels] because I saw the result of their activity the previous year and it's influence on my persimmon production.
The others present another issue. I'd be foolish to say I know exactly what influenced the activities of each species and individual tree, because it's not possible. I have a pretty good idea why, but that's just intuition developed from understanding the trees and influences that can cause variability in mast produciton.
When it comes to oaks, I will state with some degree of confidence, that you can do more with a chainsaw to increase mast production than you can with fertilizer.
But, like many things in life, what we think we understand now, might easily change based upon more and better data or information.