According to the MAP (Ministry of Agriculture, Fisheries and Food) in 1999, the dehesa (pasturage) is a "land with mature trees whose crowns cover 5-20% of the surface, and is used mainly for the pasturing."
The SEEP or Spanish Society for the Study of Pastures defined as the "surface with more or less dispersed trees and well developedherbaceous stratum, which has been eliminated, in large part, the shrubby. Agricultural origin (arable land in long rotations) and rancher.Their main production is extensive or semi-extensive farming, which often relies not only pasture herbaceous but also the breadnut andof trees fruit. "
The dehesa (pasturage) is the traditional place where the Iberian pig has been raised and fed during the montanera (open range). This type of grazing regime flame extensive Iberian pig and gives the possibility to exercise in a relaxed and calm. It consists mainly of oak trees. Being dominant Acorn the fruit will be the future of the Iberian pig food. The open woodland occupies more than 2 million hectaresenters the western and southwestern provinces of Spain.