
The Crau lowland forms a triangle with an estimated surface area of 550 km2. It is an arid pastoral lawn, forming a specific vegetation, named "coussoul". The south is called "Dry Crau", a remarkable steppe habitat. Today there are 95 km2;of intact steppe. The northern part of Crau, irrigated from the 16th century. through the Craponne canal and put into cultivation, forms the "Crau humide", where the Crau hay is produced, the first forage to obtain an AOC.