The present invention aims to provide a system that automatically shows multiple fertilization design patterns suitable for the soil and crop, in linkage with map data and in accordance with fertilization design conditions each including a different fertilizer pattern and priority condition so as to allow the user to compare the multiple fertilization patterns on the same screen. The system includes units configured to receive designation of an agricultural field on the map, then to receive a fertilization design condition including a fertilizer pattern and a priority condition, to design fertilization patterns for the agricultural field, and to display the designed fertilization patterns on the same screen.
