I also think you should re-read that "law" its actually a principle, and i dont think your understanding and applying it properly. By the logic your seeming to apply, there shoupd never be such a thing as nitrogen toxicy, phos, etc becayse the plant takes them all up equally. Well we all know that isnt true even a little bit.
This is in relation to optimum plant growth, and that having double the nitrogen wont make up for having half the phos.
I understand it perfectly, which is why I will keep posting it on this forum until others do.
First, the word "equal" does not exist in the post you are responding to, so that's something that YOU created, not I, friend.
Second, the term "balanced rate", which IS used in my post, refers to the PROPORTION of nutes used, and is similar to a "balanced meal" in that your protein, carb, and veggie load is NOT equal, but balanced in proportion. The article I linked should have made that perfectly clear....which is why I linked it.
As far as toxicity, salts are salts, and our hyrdo nutes are bound to salts to make them available to the plant. When toxicity builds up, it's not the nute as much as the SALT its bound to that robs the root zone of moisture, resulting in the back flow of liquid from the above ground level to the root zone in an attempt to keep the roots safe....which in turn fucks up the leaves on the top side. The plant has no choice in the matter, and toxicity occurs due to grower error, not the plant "pigging out" on any given available nute.