By simply inputting "area", "planting date", and "item", "when", "where" and "how much" will be displayed on the calendar, so the farmers will be able to reduce the time to calculate the usage period and usage amount. It is now possible. In addition, by entering the area, planting date, and item, you can grasp the rough production volume, and by notifying (inducing) the application user in advance, you can prevent price collapse due to overproduction.