Useful agricultural area

That surface in which livestock manure can be valued as organic fertilizers, considering that manure can be applied to the cultivable agricultural surface, in pastures and grasslands, according to the uses established in the Geographic Information System for the Identification of Agricultural Parcels (SIGPAC), taking as a reference the most up-to-date database available (with indication of the SIGPAC alphanumeric references and the crop or use).