In 1991 cultivable land in Albania amounted to about 715,000 hectares, about 25.5 % of the nation's total area. Arable land and permanent croplands totaled about 590,000 hectares and 125,000 hectares, respectively; permanent pasturelands accounted for another 409,500 hectares. More than 100,000 hectares of the cultivable land had a slope greater than 30 % and was allocated almost entirely to permanent tree crops, such as olives. Forests and woodlands covered 38 % of the total land area. The soils of the coastal plain and eastern plateau were fertile, but acidic soils were predominant in the 200,000 hectares of cropland in hilly and mountainous areas.