That's not really what happens, at all. Too much nitrogen actually creates imbalances that deplete the plant of other nutrients, while giving the appearance of lush growth. In fact, it can create very weak plant structures, which are later more prone to disease and pestilence. It's not purely nitrogen excess to worry about, but it's antagonistic effect on everything else. (and nitrogen is a big player).
Good info, that...
But we can't get targeted results, by playing with nutrient ratios. If we do, it means that a deficiency existed previously. (and possibly still does)
That's more like what I'm trying to say... Use soil testing to find the holes in your soil's nutritional profile and concentrate on meeting those since the rest is already present and doesn't need to be monkeyed with. In fact, as you pointed out, too much of one nute can cause lockout in others.
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I'm not trying to take exception, just pointing out that this is a good reason to keep it simple, and focus more on optimal growing conditions, than nutrients. We will achieve much greater success with better growing environments, and less than optimal nutrients, than we ever possibly could with overly thought out nutrient regiments, in poor growing conditions.