Autonomous agricultural spraying machine comprising a first and a second side tanks substantially arranged between a front wheel and a rear wheel respectively on each side of the machine, the autonomous agricultural spraying machine further comprising a spraying system , at least one spray pump , a first aspiration valve allowing or prohibiting the aspiration of treatment product in the first side tank , a second aspiration valve allowing or prohibiting the aspiration of treatment product in the second side tank , a regulation valve coupled to a spray valve configured to provide treatment product to the spraying system , characterized in that the agricultural machine comprises a sequencing module configured such that: during a first aspiration step (E1), the first aspiration valve is open and the second aspiration valve is closed , so that treatment product is aspirated only in the first side tank by means of the spray pump , for a predefined isolated aspiration time, for example equal to one minute; during a transition step (E2) following the first aspiration step (E1), the first aspiration valve and the second aspiration valve are open, so that treatment product is aspirated simultaneously in the first side tank and in the second side tank by means of the spray pump , for a predefined transition time, short relative to the predefined isolated aspiration time, for example equal to two seconds; during a second aspiration step (E3), following the transition step (E2), the second aspiration valve is open and the first aspiration valve is closed, so that treatment product is only aspirated in the second side tank by means of the spray pump , for the predefined isolated aspiration time, for example equal to one minute, the sequencing module being further configured to successively and iteratively implement the first aspiration step (E1), the transition step (E2), the second aspiration step (E3) and then the transition step (E2) again. during a first aspiration step (E1), the first aspiration valve is open and the second aspiration valve is closed , so that treatment product is aspirated only in the first side tank by means of the spray pump , for a predefined isolated aspiration time, for example equal to one minute; during a transition step (E2) following the first aspiration step (E1), the first aspiration valve and the second aspiration valve are open, so that treatment product is aspirated simultaneously in the first side tank and in the second side tank by means of the spray pump , for a predefined transition time, short relative to the predefined isolated aspiration time, for example equal to two seconds; during a second aspiration step (E3), following the transition step (E2), the second aspiration valve is open and the first aspiration valve is closed, so that treatment product is only aspirated in the second side tank by means of the spray pump , for the predefined isolated aspiration time, for example equal to one minute, the sequencing module being further configured to successively and iteratively implement the first aspiration step (E1), the transition step (E2), the second aspiration step (E3) and then the transition step (E2) again. <EOS>