I want to mix 28-0-0 or 34-0-0 in my spray tank for the purpose of burning the weeds up faster. How much should I put in a 25 gallon tank that is putting out 64 ounces(man that came out great) of product per K? Hopefully this is the right N% with the 28 and 34%, at least that's what I used when I worked at the co-op 15 or so years ago spraying fields. Also for the sticker I am going to use dish detergent. How much of that should I be putting into the tank? Thanks for your helpful answers. I just completed a spray rig for my ztr and it works great. I can spray about 50K per tankful. Much more efficient than using a backpack like I have been!