The Europa website provides information on food, farming and fisheries:
https://ec.europa.eu/info/food-farming-fisheries
The Europa website contains an overview of EU agricultural policy. It contains summaries of latest policy developments, overviews of relevant legislation, statistics and links to key documents and case law on agricultural policy.
http://europa.eu/pol/agr/index_en.htm
The European Commission's Directorate General Agriculture and Rural Development offers the most detailed source for information on policy developments in agriculture. It includes updated information on agriculture and trade policy, food and enlargement.
http://ec.europa.eu/dgs/agriculture/index_en.htm
Specific information on the Common Agricultural Policy (CAP) is available here:
https://ec.europa.eu/info/food-farming-fisheries/key-policies/common-agricultural-policy_en