La Bureba
Briviesca has the largest cultivated area of Castilla y León and one of the largest in Spain. That is why in many cases La Bureba is considered the granary of Castilla. In Briviesca it is the main economic activity. In the region more than 40,000 hectares of land are cultivated. The cereal is mainly cultivated because this zone has the optimum climate for this type of crop, which occupies 30,000 hectares. The sunflower (8,000 hectares) and other crops such as peas, soybeans, or even opium are also cultivated to a great extent, although the latter has extreme vigilance, control and protection.