RE: how much round up
Go to Monsantos website and look at the label...there is no such thing as a general use rate and there is a different amount of carrier to use (water) per acre depending on the species you are going after.
It makes a HUGE difference on performance depending on the target. Dont believe this garbage that it makes no difference...and 20 ounces may be the rate for some uses but certainly not all uses.
Chemical companies spend a bloody fortune to build the data to support the lable...dont fall for the poster experts who over generalize.