Corn can be eaten as food and planted as a crop. The amount of corn grown will depend on the relevant party members' Farming skill.
One's initial Corn can be purchased with Gold, or even stolen from other factions' crop fields, but note that NPCs will open fire if they detect a party member stealing their corn.
Growing Corn will require a Watering Can.
|“||You can eat this or plant it to grow more corn. To plant it you need to equip using [Equip] and then press [MainAction] to Plant. You need to have a Farming skill of at least 1 to plant crops.||”|
— In-game Description