How do you determine how much product to add to fill a full tank?

To determine how much product to add to fill a full tank, the correct approach is to consider the area that will be covered by one full tank of the application and then multiply this area by the application rate. This method allows you to calculate how many liters of product are needed to appropriately treat the entire area you plan to cover.

By using the area covered by one tank (measured in hectares) and the application rate (given in liters per hectare), you achieve a precise calculation of the total volume of product necessary to ensure effective application across the designated area. This is a straightforward way of translating the tank capacity into practical application terms.

In contrast, the other approaches do not effectively address the question. For instance, considering the area treated multiplied by the application rate would only give you a calculation for the amount used rather than how much to fill the tank based on tank capacity. Similarly, dividing the application rate by the area covered does not yield a practical volume measurement for adding to the tank, and multiplying tank size by area covered provides a figure that doesn't relate directly to the amount of product needed for application efficiency.