The Secretary of Agriculture shall procure and preserve all information concerning agriculture, rural development, aquaculture, and human nutrition which he can obtain by means of books and correspondence, and by practical and scientific experiments, accurate records of which experiments shall be kept in his office, by the collection of statistics, and by any other appropriate means within his power; he shall collect new and valuable seeds and plants; shall test, by cultivation, the value of such of them as may require such tests; shall propagate such as may be worthy of propagation; and shall distribute them among agriculturists; and he shall advise the President, other members of his Cabinet, and the Congress on policies and programs designed to improve the quality of life for people living in the rural and nonmetropolitan regions of the Nation.