I guess you're talking about 32% liquid N. When I use liquid N, it's 19%. You just spray it or pour it or drip it on. It'll freeze up on your nozzle tips though if it's below 50 degrees or so. That's some nasty stuff to handle and rather than mix it with water (although I suppose you could) I'd adjust the application rate to where I was getting 50-60 units of N per acre which is always the rate of application that I shoot for on Nitrogen. How many gallons do you have? One other thing you may or may not know is if you put liquid N on grazing land, you'll need to keep the cows off it for a week so that the N has time to be assimilated into the soil and plants. Concentrated Nitrogen is highly toxic to cows.