What are the agricultural symbols used in Freemasonry?

The primary agricultural symbols in the Craft are corn, wine, and oil, alongside the ear of corn and the cornucopia.

Corn, wine, and oil serve as the Masonic elements of consecration used when dedicating lodges 23. Symbolically, they represent the wages of a Fellowcraft 1. In their ritual application, corn denotes nourishment and abundance, standing as the essential "staff of life"; wine signifies refreshment and gladness; and oil represents joy, peace, and divine grace 213. During processions, corn is carried in a golden vessel, while wine and oil are borne in silver vessels, emphasizing the primary necessity of corn over the comforts represented by the other two 3. Mystically and morally, these wages represent the fruits of a Mason's spiritual labor and the obligation to impart bread, comfort, and consolation to those in distress 13.

An ear of corn, or grain, functions as a distinct emblem of plenty 1. Connected with the Hebrew word shibboleth, which signifies both an ear of grain and a flood of water, it draws on ancient harvest symbolism to represent abundance and wealth 1.

The cornucopia, or horn of plenty, originates in classical mythology as the horn of Amalthea 13. Adopted as the jewel of the Stewards of a lodge, it symbolizes abundance and reminds those officers of their duty to see that the brethren are properly served and provided for during times of refreshment 13.