The applicator is based on DGPS satellite positioning principle. It combines GPS, GIS and DDG together to make fertilization decisions and to output the application rate of fertilization into an IC card.

• 该系统基于 DGPS卫星定位原理 ,将 GPS、GIS与 DDS相结合 ,进行施肥作业决策 ,决策的施肥数据写在 IC卡上。