Generally 15 GPA is a good ballpark rate of total material per acre. One exception to that is uup if the target is fescue that you are trying to kill. In that case, Monsanto wants the carrier rate cun half or even down to 5 GPA.

The rate per acre is dependent on 3 factors....pressure, speed and nozzel selection. The use of very generalized statements on any board on any subject is dangerous. Always calibraate your sprayer befor ever using it. Always make sure tires have same pressure on ATV or speed will vary. And Always read the product labels befor using chemicals. If in doubt or if you feel uneasy doing the applications, get a pro to do it.