I do not want to sound like a know-it-all here, because I for certain have much more to learn, as most of us do.
When I read the article, really to me there is nothing in it that I have not already learned after tuning the Late Season Fertilization Methods from Rutgers and Penn State many years ago. OSU's article is informative, but I feel there is more to write about.
I use the term "test plots" with the idea that universities want control over their test(s) and know whats in the soil(s) before, as well as after inputs.
Their study(s) are tests are they not?
And I will continue to ask that "Professors" as well as "Turfgrass Science" Experts be a part of the education/discussion process here.
I feel there is likely still, a knoweldege gap between what "Professors/Scientists" learn in testing, and what the applicator is doing in the field.
Of course that open discussion may not "Pay The Bills" for them, and I DO respect that as well.
I can only contribute my real world experience(s) as I already have.
I am NOT an "Expert".