This part is directly related to the previous one. It is the total number of acre inches that you would like to have applied to your crop. If you have a rain gauge TIED to this pivot, you will need to enter the number including rainfall. If you do not have a rain gauge tied to the pivot you will only be able to enter a estimated amount that you would like to be applied. With the rain gauge tied to the field, any rainfall that comes between the start date and the finish date for the rain gauge will be added into the Total amount of acre inches applied and taken off of the amount needed to finish with the desired amount of acre inches. Obviously this is NOT intended to replace your own wisdom in watering your crop. It is an attempt to create a guideline to help you see the situation in a different light.