Yes it is a dirty field, I actually have a few 10 acre plots that did not get seeded. They have been mowed once and will be mowed again before being sprayed out for fall. So needless to say there is a wide range of weeds and will be using high rates regardless.
let me spice up the question, how much water should one use on preharvest burndowns (straight glyphosate)? I have been using 10 gal in the past (and some this year) but Im wondering about dialing it down to 8.