.25 oz per acre of cimmeron I believe it is and qt per acre of round up, (generic) per acre , 13 gallon H2O per acre , if you have 10 acres , get the small bottel of cimmeron, I think it is 2 oz , the large bottle is 10 oz . any generic glysophate (round Up) will do, add a little surfactant to the tankmix, 1 gt per 100 gallons of water is plenty , you must spray this before any hay has begin to green up , or it will kill the hay ,IT MUST STILL BE DORMANT FROM THE WINTER