PROBLEM TO BE SOLVED: To provide a farm operation-supporting apparatus and an operation navigator for agricultural vehicles, capable of performing precision farming and carrying out efficient driving support. SOLUTION: The farm operation-supporting apparatus performs message communication between a plurality of objects and produces farm operation-supporting information and the produced farm operation-supporting information is transmitted to a navigator. The navigator displays farm operation-supporting information acquired from the farm operation-supporting apparatus and position information acquired from a prescribed measuring apparatus and outputs control order for carrying out automatic operation in an operation vehicle such as tractor and control order for carrying out fertilizer application or agrochemical application in a prescribed amount. COPYRIGHT: (C)2005,JPO&NCIPI
