Is the nitrogen in urea different from nitrogen in "organic fertilizers" in terms of plant nutrition?

No; the ammoniac nitrogen or nitrate nitrogen taken up by plants is chemically identical regardless of the source. Nitrate or ammonium that results from urea application is indistinguishable from the nitrate or ammonium that results from manure application. A plant utilizes inorganic ions, and the source of these nutrients is irrelevant to either the yield or quality of the fruit, grain, or vegetative matter produced by the plant.

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I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.