Such a statutory lien is specifically excluded from application of the UCC, as are real estate interests. (See Ill. Rev. Stat. 1983, ch. 26, par. 9-104(b); McGahey v. Fuller (1985), 131 Ill. App.3d 663, 476 N.E.2d 438; Dwyer v. Cooksville Grain Co. (1983), 117 Ill. App.3d 1001, 454 N.E.2d 357.) As the authors of the Illinois Code Comment to section 9-312(2) observe, a practical solution to such a possible conflict "may be found in a subordination agreement under sec. 9-316."