Effectiveness Evaluation and Combined Application of Land Leveling Technologies

The effectiveness of the conventional and laser controlled land leveling procedures was evaluated in the plain of North China. The results indicated that a relatively high leveling precision could be reached when a combined application of the two land leveling procedures was adopted in the field for land preparation. The conventional land leveling technology could be used for the primary earth moving process until the standard deviation of the field surface elevation approaches to 4～5 cm level. Then the laser controlled equipment should be used in an effort to achieve the leveling precision needed.