It shall be the duty of the commissioner to publish bulletins setting forth the quotations for agricultural products sold in the principal markets of the state. The bulletins shall also contain information concerning the available surplus of the principal agricultural products and the demand for such products in the markets of the state, and other markets where agricultural products are customarily sold. The commissioner may periodically prepare and distribute bulletins containing:
(1) The official grades, classifications and standards for agricultural products;
(2) The methods for marking, advertising, and using such grades, classifications, and standards;
(3) Lists of the principal markets in the state and the principal markets outside of the state where agricultural products are sold or distributed;
(4) Such other information which may be of value or assistance in the production, handling, and marketing of agricultural products.