Application and Evaluation of LaserControlled Land Leveling Technology

Land leveling is an important measure for improving the surface irrigation. The lasercontrolled land leveling technology, as the most advanced land grading technology in the world, has been widely used in developed countries. The equipment and basic principles of this method as well as its application in China were introduced. The effective evaluation, working efficiency and cost of the lasercontrolled land leveling practices were analyzed. The results showed that the standard deviation of the field surface elevations of 2 cm or less, used to represent the precision of the leveling, could be expected after the application of lasercontrolled leveling. The average cost of land grading per cm of improvement in the standard deviation of the field surface elevation value amounts to 83 RMB yuan per hactre.