The Cols plot is located in a recent terrace (Holocene) of the Anoia river. It has been formed from materials deposited by the Anoia River in the past. They are deep soils, with a sandy-loam texture, which allows good aeration and circulation of the water in depth, as well as the extension of the roots to that depth. Being deep and moderately coarse in texture, its clay content is relatively low and avoids excess water in the rainy season, which allows the correct water supply to the plant from the deep layers in periods of low rainfall. The water retention capacity of these soils is moderate to high. The presence of carbonates and the fact of being relatively stable soils have caused their mobilization, accumulating them in the lower layers in the form of mycelia and pseudomycelia.