The dominant plants are sages (Lamiaceae) and evergreen oaks and, in drier areas, chamise (Adenostoma fasciculatum), manzanita (Arctostaphylos pungens), and species of Ceanothus.
The phenomena of agroecological environment are becoming worse and worse in the arid and semi-arid regions that has become the predominant obstacle for agriculture development.
Rendzina A type of brown earth soil typical of humid to semi-arid grasslands over calcareous rocks. The rendzina is rich in lime and has an upper humus-rich horizon.