Abstract: The present disclosure relates to a method and a system for determining the mechanical state of an agricultural land, wherein sensors, arranged in a tillage element of an agricultural machine, obtain measurements of a vibratory signal which is the product of the tillage operation of the agricultural machine on the land. Communication means send said measurements in data packets to a processor module. The processor module transfers the measurements to the frequency domain and calculates energy measurements in order to finally determine the mechanical state of the agricultural land, based on the analysis of said calculated energies, wherein the mechanical state determined comprises a degree of hardness and a degree of plasticity.