; (B) by inserting before paragraph (2) (as so redesignated) the following: (1) the term conversion means— (A) the physical conversion of farmland to a nonagricultural use; (B) the effective conversion of farmland as a consequence of physical conversion of adjacent farmland, which threatens the continued viability of the land for agricultural use; or (C) a change in management of federally owned land historically used for agriculture to a nonagricultural use; ; (C) in paragraph (2) (as so redesignated)— (i) in subparagraph (B), by striking that is used for and inserting that is suitable for ; and (ii) in subparagraph (C), by inserting and is suitable after local importance ; (D) by inserting after paragraph (2) (as so redesignated) the following: (3) the term farmland of national significance means farmland that is the most suitable for intensive crop and food production, as determined by the Secretary, taking into consideration, among other factors, the physical and chemical characteristics of the farmland; ; (E) in paragraph (4), in the second sentence, by striking and at the end; (F) by inserting after paragraph (4) the following: (5) the term permanently protected farmland means farmland encumbered by a conservation easement— (A) held by the Federal Government, a State, Tribal, or local unit of government, or a land conservation organization; and (B) that is perpetual or the maximum number of years allowed by State law; ; (G) in paragraph (6) (as so redesignated), by striking the period at the end and inserting a semicolon; (H) in paragraph (7) (as so redesignated), by adding and at the end; and (I) in paragraph (8) (as so redesignated), by striking the semicolon at the end and inserting a period. (b) Farmland protection policy Section 1541 of the Agriculture and Food Act of 1981 ( 7 U.S.C. 4202 ) is amended to read as follows: 1541. Farmland protection policy (a) In general It is the policy of the United States that Federal programs— (1) shall minimize the conversion of farmland to nonagricultural uses