I bought a 25 gal ATV boom sprayer to kill the weeds at the little league. I purchased a gallon of Speed Zone and have read the attached instructions. It didn't tell me how many ounces per gallon to mix. What it did say, I didn't understand. Example: Spray volumes of 3-220 gallons per acre with sprayer adjusted to 20-40 psi are appropriate. Obviously, this is more complex than screwing a bottle of weed and feed on the end of a hose. If someone could walk me through this, I'ld appreciate it.