What climate and type of land affects the economy of a region?

In the western,eastern,and central France growing crops may not happen because it is simply to cold. The MEDITERANEAN CLIMATE which is in the south parts on France growing crops can happen because summers are hot which as you may know are the temperatures some crops need but in the south parts of France they have limited rainfall but i think that when it does rain it rains enough for the crops for a long time. Then the farmers can pick and exports for France gets MONEY.