Collective farming and communal farming are various types of "agricultural production in which multiple farmers run their holdings as a joint enterprise". There are two broad types of communal farms: agricultural cooperatives, in which member-owners jointly engage in farming activities as a collective; and state farms, which are owned and directly run by a centralized government. The process by which farmland is aggregated is called collectivization. In some countries, there have been both state-run and cooperative-run variants. For example, the Soviet Union had both kolkhozy and sovkhozy.