We analyze the methods of calculating exploitation indices of irrigation technologies using the theory of combined operation. This method is approved for conducting the group of irrigators, Doliaquamat 67/250, which is served by a tractor. From the calculation, it was found that during relocation of each sprinkler immediately after irrigating, the tractor had a dead-time of 73%. Therefore, it is possible to use the tractor for controlling the irrigation operation or for serving other pieces of equipment.