sentences:  Cork oak forests occupy around 10,000 square kilometres on the peninsula, more than half of the world's extension of this kind of forest.The cork oak forest needs siliceous soils of a sandy texture, and a mild, slightly damp climate.Under such conditions it totally or partially displaces the Holm oak; Holm oak may be found in stands of Cork Oak with a certain frequency, as well as Portuguese oaks ("Quercus faginea" subsp "broteroi").