Carl

Thanks for specific explanations.

Being unconvinced of their overall need, I still see tissue tests as an exploratory method for seeing what's wrong NOW, rather than trying to lay a basis for future crop years. Unless you grow that same exact crop (incl hybrid) in the exact same dirt under the exact same climatic conditions, you're just going to be chasing your tail. I think we only keep corn hybrids for 3 yrs on average, some less if they hiccup. So-you'd be forever digging in history knowing those circumstances have a slim, if any chance of recurring. Then throw in rotations & it really confounds their value.

That's my uneducated take on tissue tests. I'm not sure how it would be used to adjust next yrs growing crop for improvement.....unless you have some big unsolvable perpetual problem w/production.

Now, I see soil tests differently. They seem to be time-honored & most farmers learn how to work with them in one way or another. But again, that's here.