Why isn't organic nitrogen in commercial inorganic fertilizers?

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In commercial inorganic fertilizers, I know that nitrogen is included in it like urea and nitrate ions, but organic nitrogen is not included in it, right?

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Urea is an organic substance; so it can't be regarded as an inorganic fertilizer. Inorganic fertilizers include ammonium nitrate as a rich nitrogen supply. Bacterial flora can deal with this compound to synthesize the required nitrogeneous compounds. I remember the "urea cycle" in my biochemistry lessons; in there, fumaric acid is also produced. Fumaric acid is also present in Krebs' cycle, giving malic acid from succinic acid. I mean that nitrogeneous compounds can combine with some physiologically active compounds to give the required chemicals.