Any Row Crop farmers....

I was at an auction yesterday and there was a brand new 2.5 gal jug of Kilz All so i bought it for $50. The one i bought at the feed store was on sale for $70. Now i have 5 gal of the stuff and the directions say to put it on at a rate of .5 gal to the acre. Now comes the tough part. There's a lot to know when it comes to putting this on the ground. Of course you mix it with water, i think it's .5 gal to 20 gal water, and put it in the sprayer but now you need to know a couple of other issues. The rate of flow on the nozzels will probably dictate the speed in which you travel down the field with the tractor. Any formulas for this equasion?
Small Block