$50 in chemicals and application results in more beans for me.  I am in weed heaven down here.  My program was not that different than what Brad suggests.  I did something similar last year and I still had a few escapes.  I can pick up 6 bushels in non GMO with better weed control and it only costs 2-3 bushels to get there.  And, I have cleaner fields for the next crops.

I see no Marestail, pigweed or Giant Rag yet but they will soon be coming.  A year ago they were off and running, of course it is a little later year this year.

I see a few thistles but no winter annuals, just a little mouse eared chickweed in flower in wheat.