"Farmland." Any tract of land that is actively devoted to agricultural use, including, but not limited to, the commercial production of crops, livestock and livestock products as defined in section 3 of the act of June 30, 1981 (P.L.128, No.43), known as the Agricultural Area Security Law.
"Nonfarmland." Any tract of land that is not farmland.
8 Pa.C.S. § 1302.1