The system (100) comprises a modular agricultural irrigation pivot-like device (101) positioned on an agricultural field (200) in the cultivation of a crop (202a), the device (101) comprising artificial lighting sources (10a, 10b, 10c, 10d, 10e) arranged along the irrigation pivot device (101) at a predetermined distance above the aerial parts of the crop, comprising LEDs, and a plurality of energy sources that feed a plurality of artificial lighting sources, a processor in communication with a dimerizer and/or polarizer of artificial lighting sources and with power sources, wherein a processor a) adjusts (501), in the intervals of the electromagnetic spectrum, the balance between the spectral bands emitted by the light-emitting diodes; and b) determines and implements—an irrigation routine (502); and/or—light(s) supplementation routine (503); in which stages a) and b) are determined by a processor different parameters.