To determine how many bags of Milorgan lawn fertilizer you need, we can first calculate the total square footage of your lawn.
Given that your lawn is 1/4 of an acre, we can convert it to square feet by multiplying 1/4 by 43,560:
(1/4) * 43,560 = 10,890 square feet
Now, we can divide the total square footage of your lawn by the coverage of each bag (2,500 square feet) to find the number of bags needed:
10,890 / 2,500 = 4.356
Since we can't have a fraction of a bag, we round up to the nearest whole number. Therefore, you would need 5 bags of Milorgan lawn fertilizer.