Fecha de publicación: 05/02/2014 Fuente: Wipo "precision agriculture" The invention provides a precise agricultural automatic/manual variable fertilizing machine based on a virtual GPS (global position system), which aims at applying fertilizers to soil according to the crop nutrition requirements through the virtual GPS under the circumstance that farmland nutrition space distribution is not uniform so as to achieve the purposes of reducing the input, increasing the benefit and improving the quality of agricultural products. The precise agricultural automatic/manual variable fertilizing machine comprises a virtual GPS navigation system and a variable deep fertilizing and precise sowing machine, wherein the virtual GPS navigation system is separated from the variable deep fertilizing and precise sowing machine and comprises a differential global position system (DGPS), a geographic information and field operation land parcel management system, a field operation land parcel grid identification and control program, and an IC (integrated circuit) card for storing land parcel management and variable fertilization decision information.