I have to laugh, we discuss what rate to mix Glyphosate,
and measure it with an once cup.
Then put it in a hand sprayer and walk about applying it, about as accurate as pissing in the wind.
When I apply chemical to my farm fields, I calibrate my sprayer as to gallons per acre, tractor speed, air temp & wind direction, product EPA number,date & time and record it.
I come within a couple of gallons of mixture in a 10 acre field.
