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So, you can't prove your claim but to post an unsourced graph that just doesn't show what you want it to. It's not showing use of AN fertilizer going up.
You're the one obsessed with AN to the exclusion of every other nitrogen fertilizer.
And you almost have it right with that last bit about what you are calling "chemical fertilizers". AN fertilizer, the nitrogen isn't bound, it's free and leeches out with irrigation. There are fertilizers that have bound nitrogen that doesn't leech so easily and releases more gradually. Unfortunately these don't give us the yields you get from massive AN fertilizer use as we did in the past.
Organic fertilizer doesn't leach nearly as much nitrogen (nitrogen will alway leach out to some extent) as chemical fertilizers and produce better results than any chemical fertilizer because they provide other benefits in addition to plant nutrition