round up ultra is for labeled for agriculture, farm use. Dam stuff has the same A.I. as roud -up pro but a stupid differrent label. And is alot cheaper than pro. Some guys buy it and put in the pro container. I was busted for using ultra instead of pro. I add soil penetrent to mine and see Knochdown of weed less than a weeks time curling next day. And i accidently sprayed on a lawn and washed with water within 5 mins. and still killed turf completly.