What is the total herbicide needed for a full 100-gallon tank calibrated to apply 15 GPA if the label calls for 8 ounces per treated surface acre?

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To determine the total herbicide needed for a 100-gallon tank calibrated to apply 15 gallons per acre (GPA) when the label calls for 8 ounces per treated surface acre, you need to follow these steps:

First, calculate the total acres that can be treated with a 100-gallon tank at a rate of 15 GPA. This is done by dividing the total volume of the tank by the application rate:

• Total gallons in the tank = 100 gallons

• Application rate = 15 gallons per acre

Now, divide the total gallons by the rate:

100 gallons ÷ 15 GPA = approximately 6.67 acres

Next, since the herbicide label recommends 8 ounces per treated acre, you can find the total amount of herbicide needed by multiplying the number of acres by the amount of herbicide per acre:

• Total herbicide needed = 6.67 acres × 8 ounces per acre = approximately 53.36 ounces

Rounding this value gives you about 53.4 ounces, which is the total amount of herbicide required for a full 100-gallon tank calibrated to apply at 15 GPA. This demonstrates the proper calculation that leads to the correct answer.