This book introduces the readers EU's support measures on common agricultural policy. The application of the support system, which is applied in and outside of the EU, for protecting internal producers, is compared with the Turkey's ARIP programme. This comparison is done to bring better understanding on protective measures, which is done in and outside of the EU. The estimation of the net contribution of support measures on producers gain is calculated by using the OECD's Producer Subsidy Equivalent method.