Stan the few times I've helped a farmer put his herbicides in his spray tank there was a formula supplied by the Co-Op and as I recall it was a mixture of at least 5 or 6 different herbicides some were just a few ounces of this a quart of this and so much of that...a witches brew of chemicals.

I remarked to my buddy that I thought you just sprayed Round Up...he said Round Up by itself is no longer enough.