What food plots are you doing ? I usually start a new plot by mowing the weeds as short as possible with a Bush hog. Sometime in mid August, I plow the area. It sounds like you skipped that step. You can only get away with that if you use gly to kill off the weeds, which again, it sounds like you skipped.
A disk is a secondary tillage tool which means that is nearly useless on unsprayed, unplowed ground, no matter how much weight you add to it, what angle it is set at, or how sharp it is.
I disk the plowed ground and get it ready to plant (upstate NY location) around September 1. I braodcast wheat at about 50 pounds per acre and soybeans at 25 pounds per acre, then cultipack. Then I broadcast medium white clover at 5 pounds per acre then cultipack again 90 degrees from the first time.
The soybeans are the first to germinate and have unmatched attraction to deer as they begin to sprout. Since global warming kicked in, we don't get hard frosts until well into October, giving them soybeans good early season draw. Next, after the frost kills the soybeans (if the deer have not ate then all) the wheat kicks in. That will feed and attract the deer thru late season and even in winter.
The following spring, and for the next 3 to 5 years, all you will need to maintain the white clover is your Bush hog. The wheat had two jobs, attracting deer the first fall and shading out the weeds to provide a nurse crop for the clover. You do need to mow it off before it goes to seed the following spring to take full advantage of that.
No herbicide is used in this method, but the plow is the important piece of the puzzle that you have lacked. You got to use that to bury the weeds and let your disk do the job for which it was designed.