In the field and the extent of levelling required, however the accuracy of levelling depends on skill and the judgment of the operator. The amount of cut is controlled by the hydraulic system, controlled by the operator. The laser system is of quite recent origin. The levelling of land is done precisely with the automatic functioning of the laser-operated scraper. With the laser system the reference plane is generated above the ground with the help of a rotating transmitter. The tractor operator constantly receives the signals regarding high or low spots as well as on grade information on the...