Acidic soils are referred to as soils whose Ph is less than or equal to 6.5 and they are typical of mountains and foothill areas, such as Alps or Apennines and in some hilly areas in Latium and Campania. These soils are generally very fertile, rich in organic matter and with a good water holding capacity. The species that best adapt to this type of soils are the Actinidia, strawberry, cherry, and apple trees.