Amends section 721 (50 U.S.C. 4565) to add agriculture-related transactions to the definition of covered transactions, add an 'Agriculture' definition by reference to 29 U.S.C. 203, insert the Secretary of Agriculture into subsection (k)(2), and add a new subsection (r) that requires prohibition of certain transactions involving covered foreign persons and U.S. agricultural businesses or private real estate used in agriculture, with a limited presidential waiver and definitions of covered foreign person and prohibited countries.