Fuente: Wipo "precision farming" Disclosed is a computer-implemented method of determining a productivity variability index of an agricultural area. The method may comprise a step of providing a time-series of remotely sensed images of an agricultural area. The method may comprise a step of selecting from the time series of remotely sensed images of the agricultural area at least one subset of remotely sensed images based on a critical period for crop growth on the agricultural area. The method may comprise a step of transforming each subset of the remotely sensed images into a productivity image indicating a productivity distribution within the agricultural area to obtain at least one set of productivity images. The method may comprise a step of determining, based on the at least one set of productivity images, the productivity variability index of the agricultural area, wherein the productivity variability index indicates a degree of heterogeneity for the productivity distribution.