 In the twentieth century Scottish agriculture became susceptible to world markets. There were dramatic price rises in the First World War, but a slump in the 1920s and 1930s, followed by more rises in the Second World War. In 1947 annual price reviews were introduced in an attempt to stabilise the market. There was a drive in UK agriculture to greater production until the late 1970s, resulting in intensive farming and increasing mechanisation. The UK joined the European Economic Community in 1972. Some sectors became viable only with subsidies. A series of reforms to the Common Agricultural Policy from the 1990s attempted to control over-production, limit incentives for intensive farming and mitigate environmental damage. A dual farm structure emerged with large commercial farms and small pluralised and diversified holdings.
