In order to carry out the policy of this subchapter, the Secretary shall develop and implement a national food and human nutrition research and extension program that shall include, but not be limited to— (1) research on human nutritional requirements; (2) research on the nutrient composition of foods and the effects of agricultural practices, handling, food processing, and cooking on the nutrients they contain; (3) surveillance of the nutritional benefits provided to participants in the food programs administered by the Department of Agriculture ; (4) research on the factors affecting food preference and habits; and (5) the development of techniques and equipment to assist consumers in the home or in institutions in selecting food that supplies a nutritionally adequate diet. ( Pub. L. 95–113, title XIV, § 1422 , Sept. 29, 1977 , 91 Stat. 999 .) Statutory Notes and Related Subsidiaries Effective Date Section effective Oct. 1, 1977 , see section 1901 of Pub. L. 95–113 , set out as an Effective Date of 1977 Amendment note under section 1307 of this title .