Pollarded poplars are the trees of the people. They are 'working trees', cultural trees. Medieval documents describe that leaf fodder (tree hay), wood fuel and limbs for building with, were obtained from these trasmochos (pollards). They are a large part of the cultural landscape and of the work of the farmers' lives.
Possibly the biggest concentration in Europe is in Aguilar del Alfambra where 4700 pollard polars can be found. In 2009, the first Pollard Poplar Festival was celebrated and this big and healthy poplar, was selected to symbolise 800 year of pollarding in the region. The tree shares a common history with local people and its origin tied to the landscape.