You have calibrated your equipment to spray 50 gallons per acre. If the label calls for 3 pounds of formulation per 100 gallons of water, how much formulation should you add to make 50 gallons of finished spray?

To determine how much formulation to add to 50 gallons of finished spray when the label specifies 3 pounds of formulation per 100 gallons of water, first, we need to understand the relationship between the amounts specified.

Since the label says 3 pounds of formulation is required for 100 gallons, we can calculate the amount needed for 50 gallons by using a proportion. If 100 gallons requires 3 pounds, then 50 gallons, which is half of that amount, would require half of the 3 pounds.

Calculating this gives: [ \text{Amount for 50 gallons} = \frac{3 \text{ pounds}}{100 \text{ gallons}} \times 50 \text{ gallons} = 1.5 \text{ pounds} ]

Thus, if you are mixing 50 gallons of finished spray, you should add 1.5 pounds of the formulation. This calculation demonstrates the practical application of the dilution ratio provided on the label, ensuring that the correct concentration is maintained for effective spraying.